Generating thread dump on java 1.5

Hello,
I have an issue that I need an advise for.
I have a Java process that is stuck. I suspect it is in a deadlock. The version is 1.5, and the trouble is that the process is run via a 3rd party software, meaning I am not able to connect to its shell.
Any ideas how I can do it?
Thanks,

rdrbnhd wrote:
Hello,
I have an issue that I need an advise for.
I have a Java process that is stuck. I suspect it is in a deadlock. The version is 1.5, and the trouble is that the process is run via a 3rd party software, meaning I am not able to connect to its shell.If you have access to the code of the Java process make a logger for it and trace where things are in the code when you have to break.

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    "PoolThread-2" prio=1 tid=0x2ba1c960 nid=0xcf9 in Object.wait() [2b3f3000..2b3f386c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c1178> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c1178> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-1" prio=1 tid=0x2ba1be10 nid=0xcf9 in Object.wait() [2b474000..2b47486c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c11d0> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c11d0> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-0" prio=1 tid=0x2ba1b2c0 nid=0xcf9 in Object.wait() [2b4f5000..2b4f586c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c1228> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c1228> (a org.mortbay.util.ThreadPool$PoolThread)
    "Acceptor ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=8009]" prio=1 tid=0x2ba1af70 nid=0xcf9 runnable [2b576000..2b57686c]
         at java.net.PlainSocketImpl.socketAccept(Native Method)
         at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:353)
         - locked <0x3d2c12d8> (a java.net.PlainSocketImpl)
         at java.net.ServerSocket.implAccept(ServerSocket.java:448)
         at java.net.ServerSocket.accept(ServerSocket.java:419)
         at org.mortbay.util.ThreadedServer.acceptSocket(ThreadedServer.java:346)
         at org.mortbay.util.ThreadedServer$Acceptor.run(ThreadedServer.java:507)
    "PoolThread-9" prio=1 tid=0x2ba1a420 nid=0xcf9 in Object.wait() [2b5f7000..2b5f786c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c13a8> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c13a8> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-8" prio=1 tid=0x2ba198d0 nid=0xcf9 in Object.wait() [2b678000..2b67886c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c1400> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c1400> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-7" prio=1 tid=0x2c3a4ad8 nid=0xcf9 in Object.wait() [2b6f9000..2b6f986c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c1458> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c1458> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-6" prio=1 tid=0x2c3a4788 nid=0xcf9 in Object.wait() [2b77a000..2b77a86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c14b0> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c14b0> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-5" prio=1 tid=0x2c3a3c58 nid=0xcf9 in Object.wait() [2b7fb000..2b7fb86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c1508> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c1508> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-4" prio=1 tid=0x2ba8bfe8 nid=0xcf9 in Object.wait() [2b87c000..2b87c86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c1560> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c1560> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-3" prio=1 tid=0x2ba78040 nid=0xcf9 in Object.wait() [2b8fd000..2b8fd86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c15b8> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c15b8> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-2" prio=1 tid=0x2ba69c18 nid=0xcf9 in Object.wait() [2b97e000..2b97e86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c1610> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c1610> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-1" prio=1 tid=0x2ba69a08 nid=0xcf9 in Object.wait() [2b9ff000..2b9ff86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c1668> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c1668> (a org.mortbay.util.ThreadPool$PoolThread)
    "PoolThread-0" prio=1 tid=0x2ba7ebc8 nid=0xcf9 in Object.wait() [2bb8e000..2bb8e86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d2c16c0> (a org.mortbay.util.ThreadPool$PoolThread)
         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:450)
         - locked <0x3d2c16c0> (a org.mortbay.util.ThreadPool$PoolThread)
    "Acceptor ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=8020]" prio=1 tid=0x2ba7ea18 nid=0xcf9 runnable [2bc0f000..2bc0f86c]
         at java.net.PlainSocketImpl.socketAccept(Native Method)
         at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:353)
         - locked <0x3d2c1770> (a java.net.PlainSocketImpl)
         at java.net.ServerSocket.implAccept(ServerSocket.java:448)
         at java.net.ServerSocket.accept(ServerSocket.java:419)
         at org.mortbay.util.ThreadedServer.acceptSocket(ThreadedServer.java:346)
         at org.mortbay.util.ThreadedServer$Acceptor.run(ThreadedServer.java:507)
    "SessionScavenger" daemon prio=1 tid=0x2ba8bb18 nid=0xcf9 waiting on condition [2bd90000..2bd9086c]
         at java.lang.Thread.sleep(Native Method)
         at org.mortbay.jetty.servlet.AbstractSessionManager$SessionScavenger.run(AbstractSessionManager.java:428)
    "Thread-4" daemon prio=1 tid=0x2ba8c6f0 nid=0xcf9 in Object.wait() [2beb9000..2beb986c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d23d438> (a java.util.TaskQueue)
         at java.util.TimerThread.mainLoop(Timer.java:429)
         - locked <0x3d23d438> (a java.util.TaskQueue)
         at java.util.TimerThread.run(Timer.java:382)
    "GC Daemon" daemon prio=1 tid=0x2c32cd20 nid=0xcf9 in Object.wait() [2bfbb000..2bfbb86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d0b4b28> (a sun.misc.GC$LatencyLock)
         at sun.misc.GC$Daemon.run(GC.java:100)
         - locked <0x3d0b4b28> (a sun.misc.GC$LatencyLock)
    "RMI Reaper" prio=1 tid=0x2c325c88 nid=0xcf9 in Object.wait() [2c03c000..2c03c86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d0b4078> (a java.lang.ref.ReferenceQueue$Lock)
         at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
         - locked <0x3d0b4078> (a java.lang.ref.ReferenceQueue$Lock)
         at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
         at sun.rmi.transport.ObjectTable$Reaper.run(ObjectTable.java:330)
         at java.lang.Thread.run(Thread.java:534)
    "Thread-3" daemon prio=1 tid=0x2c33be48 nid=0xcf9 in Object.wait() [2c0bd000..2c0bd86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d0b4378> (a java.util.TaskQueue)
         at java.lang.Object.wait(Object.java:429)
         at java.util.TimerThread.mainLoop(Timer.java:403)
         - locked <0x3d0b4378> (a java.util.TaskQueue)
         at java.util.TimerThread.run(Timer.java:382)
    "RMI TCP Accept-0" daemon prio=1 tid=0x2c33b8e0 nid=0xcf9 runnable [2c13e000..2c13e86c]
         at java.net.PlainSocketImpl.socketAccept(Native Method)
         at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:353)
         - locked <0x3d0b40d8> (a java.net.PlainSocketImpl)
         at java.net.ServerSocket.implAccept(ServerSocket.java:448)
         at java.net.ServerSocket.accept(ServerSocket.java:419)
         at sun.rmi.transport.tcp.TCPTransport.run(TCPTransport.java:334)
         at java.lang.Thread.run(Thread.java:534)
    "Thread-2" daemon prio=1 tid=0x2c340060 nid=0xcf9 runnable [2c1bf000..2c1bf86c]
         at java.net.PlainSocketImpl.socketAccept(Native Method)
         at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:353)
         - locked <0x3d0b1730> (a java.net.PlainSocketImpl)
         at java.net.ServerSocket.implAccept(ServerSocket.java:448)
         at java.net.ServerSocket.accept(ServerSocket.java:419)
         at org.jboss.web.WebServer.run(WebServer.java:258)
         at org.jboss.web.ThreadPool$Worker.run(ThreadPool.java:163)
    "ScannerThread" daemon prio=1 tid=0x2c3403d8 nid=0xcf9 waiting on condition [2cdc7000..2cdc786c]
         at java.lang.Thread.sleep(Native Method)
         at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:217)
         at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:190)
    "Thread-0" daemon prio=1 tid=0x2c327b00 nid=0xcf9 in Object.wait() [2c240000..2c24086c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d05d2d0> (a java.util.TaskQueue)
         at java.util.TimerThread.mainLoop(Timer.java:429)
         - locked <0x3d05d2d0> (a java.util.TaskQueue)
         at java.util.TimerThread.run(Timer.java:382)
    "DestroyJavaVM" prio=1 tid=0x2df28218 nid=0xcf9 waiting on condition [0..bfffccc4]
    "Signal Dispatcher" daemon prio=1 tid=0x080c33f8 nid=0xcf9 waiting on condition [0..0]
    "Finalizer" daemon prio=1 tid=0x080bed60 nid=0xcf9 in Object.wait() [2e3fc000..2e3fc86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d0b5930> (a java.lang.ref.ReferenceQueue$Lock)
         at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
         - locked <0x3d0b5930> (a java.lang.ref.ReferenceQueue$Lock)
         at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
         at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
    "Reference Handler" daemon prio=1 tid=0x080be9d0 nid=0xcf9 in Object.wait() [2e47d000..2e47d86c]
         at java.lang.Object.wait(Native Method)
         - waiting on <0x3d0b52f8> (a java.lang.ref.Reference$Lock)
         at java.lang.Object.wait(Object.java:429)
         at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:115)
         - locked <0x3d0b52f8> (a java.lang.ref.Reference$Lock)

    have you checked bugs.sun.com to see if this has been reported?
    And if not, file one and attach your dump for them to look into it.

  • Understanding Java Thread Dump

    Hi,
    I was looking at the following thread dump
    Full thread dump Java HotSpot(TM) Server VM (11.0-b16 mixed mode):
    "pool-3-thread-1428" prio=10 tid=0x72b83800 nid=0x60ef waiting on condition [0x73318000..0x73318fb0]
    java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for <0x98983260> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:424)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:323)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:874)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:945)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)
    "MergeTask" daemon prio=10 tid=0x09454c00 nid=0x60e7 waiting for monitor entry [0x65106000..0x65106f30]
    java.lang.Thread.State: BLOCKED (on object monitor)
    at org.apache.log4j.Category.callAppenders(Category.java:201)
    - waiting to lock <0x96d90bb8> (a org.apache.log4j.spi.RootLogger)
    at org.apache.log4j.Category.forcedLog(Category.java:388)
    at org.apache.log4j.Category.log(Category.java:853)
    at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
    I can see that 0x98983260 and 0x96d90bb8 are memory addresses of condition object and lock object respectively (I hope ti. But I was puzzled with [0x73318000..0x73318fb0] and [0x65106000..0x65106f30].
    What do these memory ranges indicate? Is there any documentation related to thread dump?
    In OpenJDK source code I can see following comment. But I did not understand what it means.
    // print guess for valid stack memory region (assume 4K pages); helps lock debugging
    st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12));
    Thanks,
    Unmesh

    Thread Dump Analysis On AIX Platform:
    http://middlewaremagic.com/weblogic/?p=4348

  • How to get complete Java thread dump?

    I suspect a deadlock on a IWS 6.0SP5 running on Solaris 8 with Sun JDK 1.4.1, how can I make a full thread dump?
    I have enabled LogStdout and LogStderr in magnus.conf.
    regards
    Lars Krog-Jensen

    Thanx for your reply,
    but there are 2 ns-httpd processes, which one do I
    send the kill to.
    If I send it to the wrong ns-httpd the server
    restarts.
    regards Lars Krog-JensenIt's the last one in the "PID chain" (the last child process) and the one using the most memory.

  • How to get a thread dump, in case of an IDE freeze

    When you're working with the IDE and if it either freezes or becomes sluggish for no apparent reason, it's recommended to generate a thread dump, and report it to Studio feedback alias ([email protected]) with a description of what happened and attach the dump to it.
    A thread dump is an invaluable source of information to IDE developers when investigating deadlocks and some performance issues. It is a textual dump of all active threads and monitors of Java apps running in a Virtual Machine.
    The ways to generate a thread dump differ depending on the platform:
    * Windows systems
    Press Ctrl-Break in the command console you used to start the IDE.
    You won't be able to see the console in case you started the IDE using the default desktop icon created by the IDE installer. To be able to generate the thread dump, you must launch the IDE using a console window (invoke Command Prompt, go to {studio-install-dir}/bin and type runide.exe), or configure the desktop shortcut properties to launch the runide.exe program instead of the default runidew.exe.
    Note: You should increase the screen buffer size of the command prompt, so that it could retian the entire thread dump output. To do that, on the command prompt where IDE is running, open the properties dialog box by right clicking on the titlebar and selecting 'properties'. Then select the 'layout tab' and increase the 'screen buffer size' parameters to - width - 200, Height - 4000.
    * Unix systems
    Press Ctrl-\ in the terminal console you used to start the JSE.
    Alternatively, you can also generate a thread dump by sending the QUIT signal to the Java VM running the JSE
    kill -QUIT process_id
    where process_id is the process number of the respective java process.
    -------Here is a sample thread dump -------
    Full thread dump Java HotSpot(TM) Client VM (1.4.2_01-b06 mixed mode):
    "Text-Layout" daemon prio=2 tid=0x0886ebd8 nid=0x4e4 in Object.wait() [9e8f000..9e8fd94]
    at java.lang.Object.wait(Native Method)
    - waiting on <0x11730910> (a org.netbeans.editor.view.spi.ViewLayoutQueue)
    at java.lang.Object.wait(Object.java:429)
    at org.netbeans.editor.view.spi.ViewLayoutQueue.waitForTask(ViewLayoutQueue.java:128)
    - locked <0x11730910> (a org.netbeans.editor.view.spi.ViewLayoutQueue)
    at org.netbeans.editor.view.spi.ViewLayoutQueue$LayoutThread.run(ViewLayoutQueue.java:182)
    "Compilation" daemon prio=2 tid=0x0883d878 nid=0xb1c in Object.wait() [9c8f000..9c8fd94]
    at java.lang.Object.wait(Native Method)
    - waiting on <0x1143dde0> (a java.util.LinkedList)
    at java.lang.Object.wait(Object.java:429)
    at org.netbeans.core.compiler.CompilationEngineImpl$CompilerThread.nextJobAndTask(CompilationEngineImpl.java:162)
    - locked <0x1143dde0> (a java.util.LinkedList)
    at org.netbeans.core.compiler.CompilationEngineImpl$CompilerThread.run(CompilationEngineImpl.java:175)
    "TimerQueue" daemon prio=5 tid=0x03575478 nid=0xb18 in Object.wait() [988f000..988fd94]
    at java.lang.Object.wait(Native Method)
    - waiting on <0x10d4af60> (a javax.swing.TimerQueue)
    at javax.swing.TimerQueue.run(TimerQueue.java:231)
    - locked <0x10d4af60> (a javax.swing.TimerQueue)
    at java.lang.Thread.run(Thread.java:534)
    "AWT-EventQueue-1" prio=7 tid=0x0344fae0 nid=0xb14 in Object.wait() [3caf000..3cafd94]
    at java.lang.Object.wait(Native Method)
    - waiting on <0x10d4afe8> (a java.awt.EventQueue)
    at java.lang.Object.wait(Object.java:429)
    at java.awt.EventQueue.getNextEvent(EventQueue.java:339)
    - locked <0x10d4afe8> (a java.awt.EventQueue)
    at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:162)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

    You can get a thread dump (Windows only) whitout any preparation. Simply use the Stack Trace tool from this web site:
    http://tmitevski.users.mcs2.netarray.com
    It works on Windows services too.

  • Dump complete java VM state as core dump (not via OS) possible?

    Hi everyone,
    I've a problem debugging an application.
    Background: Sometimes my application comes to a very unlikely state, which at the moment results in an error message. The stack trace alone has no great value, since this state is cause by the interaction of more than one thread. The state is resolved throwing an exception, the program continues normally.
    Goal: If I reach this state, I want to suspend the application, dump the complete state of all java threads, objects, ... (complete java memory core dump) to analyse it later.
    Question: Is there a possibility to generate such dumps?
    Just thinking:
    One posibility would be, to send a signal from the vm to some external program (e.g. udp packet), this program attaches a standard OS-level debugger (e.g. gdb under linux), dumps the core, resumes app, detach. But I guess reconstruction of internal VM state from complete dump is rather hard, is it?
    I've looked at jdb, to see if it has some java-core-dump functions, but it seems not to be so. Are there alternative implementations, or helper scripts that make jdb loop over all java object addresses and dump them?
    Does someone known about the jdb remote debugging interface? Is the protocol public, can I implement such a feature on myself?

    Hi everyone,
    I was looking for a way to dump the complete state of a JVM (all runing threads, objects, ...) and afterwards to analize the dumped data. I have found a thread(http://forum.java.sun.com/thread.jspa?threadID=735052) here in the forums with some explainations how this could be done using the Java 2 sdk 1.5.0 - troubleshooting tools (http://java.sun.com/j2se/1.5.0/docs/tooldocs/experimentaltools.html).
    I've made a small application, which starts a thread and just prints out continously some messages to the console.
    After that I attached with gdb to the running process as described, and generated a core file.
    Unfortunatelly on calling jdsadebugd with the core dump it throws the following exception:
    jsadebugd /..../jdk1.5.0_07/bin/java core.18294 DebServ
    Attaching to core core.18294 from executable /.../jdk1.5.0_07/bin/java and starting RMI services, please wait...
    Error attaching to core file or starting server: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the core file
    at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method)
    at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:258)
    at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:624)
    at sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:610)
    at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:323)
    at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:298)
    at sun.jvm.hotspot.HotSpotAgent.startServer(HotSpotAgent.java:234)
    at sun.jvm.hotspot.DebugServer.run(DebugServer.java:94)
    at sun.jvm.hotspot.DebugServer.main(DebugServer.java:29)
    at sun.jvm.hotspot.jdi.SADebugServer.main(SADebugServer.java:46)
    Even if I try to print the shared objects mapping with jmap it fails with the following message:
    jmap /.../jdk1.5.0_07/bin/java core.18294
    Attaching to core core.18294 from executable /.../jdk1.5.0_07/bin/java, please wait...
    Error attaching to core file: Can't attach to the core file
    Does anyone have an idea what goes wrong here?

  • Why is thread nid missing in thread dump

    Hello,
    If I create a thread dump locally on my machine I get thread IDs like this
    >2015-02-09 10:30:53
    >Full thread dump Java HotSpot(TM) 64-Bit Server VM (24.51-b03 mixed mode):
    >"RMI TCP Connection(2)-10.10.10.103" daemon prio=6 tid=0x000000001047a000 nid=0x1004 runnable [0x000000001584e000]
    However, one of our customers has an environment where he gets this when he generated  a thread dump
    > 2015-02-03 11:09:09
    > Full thread dump Java HotSpot(TM) 64-Bit Server VM (24.60-b09 mixed mode):
    > "Thread-65526" - Thread t@139145
    What you see is that for the latter dump the nid is missing from which we can obtain a relation to the OS thread.
    Can you tell me how this can happen? A lot googling didn't gave me a thread dump like this either.
    Best regards
    Michael

    I recall that post.
    You were announcing or advertising some web page of yours.
    The link you had wasn't to some web page
    but when clicked a download installatin of some software started.
    A moderator probably moved the forum post out of wherever you posted it
    to a location where the site admins could inspect it.

  • Large Memory Usage and Frozen [thread dump attached]

    Hi,
    SQL Developer (Version 2.1.1.64, WinXP Pro, Java 1.6, Oracle 10g R2) always uses at least 550MB of memory, if left open, for more than a day, it invariably goes up to 700-800MB.
    If I close all windows and connections, virtually no memory is reclaimed.
    I clicked + beside a view to see the columns, sqldeveloper froze for a few minutes, below is the thread dump.
    2010-05-21 11:31:58
    Full thread dump Java HotSpot(TM) Client VM (14.2-b01 mixed mode):
    "CONNECTION_ALIVE" prio=6 tid=0x3891c000 nid=0x1d58 waiting for monitor entry [0x3a55f000]
    java.lang.Thread.State: BLOCKED (on object monitor)
    at oracle.jdbc.driver.T4CConnection.doPingDatabase(T4CConnection.java:3398)
    - waiting to lock <0x09ad05f8> (a oracle.jdbc.driver.T4CConnection)
    at oracle.jdbc.driver.PhysicalConnection.pingDatabase(PhysicalConnection.java:7074)
    at oracle.javatools.db.ora.BaseOracleDatabase.isConnectionAlive(BaseOracleDatabase.java:165)
    at oracle.javatools.db.AbstractDatabase$1.run(AbstractDatabase.java:316)
    at java.lang.Thread.run(Thread.java:619)
    "Loading Children" prio=6 tid=0x3891bc00 nid=0x12c4 waiting on condition [0x39d5f000]
    java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for <0x03eab570> (a java.util.concurrent.FutureTask$Sync)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:905)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1217)
    at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:218)
    at java.util.concurrent.FutureTask.get(FutureTask.java:83)
    at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$IdeTaskTracker.run(RaptorTaskManager.java:532)
    at java.lang.Thread.run(Thread.java:619)
    "pool-2-thread-57" prio=6 tid=0x3891b400 nid=0x2094 waiting on condition [0x35b5f000]
    java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for <0x09b819f0> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireNanos(AbstractQueuedSynchronizer.java:841)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireNanos(AbstractQueuedSynchronizer.java:1160)
    at java.util.concurrent.locks.ReentrantLock.tryLock(ReentrantLock.java:416)
    at oracle.dbtools.raptor.utils.Connections.lock(Connections.java:1334)
    at oracle.dbtools.raptor.utils.Connections.lock(Connections.java:1319)
    at oracle.dbtools.raptor.utils.Connections.lock(Connections.java:1306)
    at oracle.dbtools.raptor.navigator.xml.AbstractItemInstance.lockConnection(AbstractItemInstance.java:52)
    at oracle.dbtools.raptor.navigator.xml.XmlNodeInstance.listChildren(XmlNodeInstance.java:55)
    at oracle.dbtools.raptor.navigator.ObjectNodeFilter$ObjectNodeFilterLoadTask.doWorkImpl(ObjectNodeFilter.java:78)
    at oracle.dbtools.raptor.navigator.DeferredLoadingFilter$FilterLoadTask.doWork(DeferredLoadingFilter.java:124)
    at oracle.dbtools.raptor.navigator.DeferredLoadingFilter$FilterLoadTask.doWork(DeferredLoadingFilter.java:113)
    at oracle.dbtools.raptor.backgroundTask.RaptorTask.call(RaptorTask.java:193)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$RaptorFutureTask.run(RaptorTaskManager.java:492)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:619)
    "pool-2-thread-55" prio=6 tid=0x38d68400 nid=0xd74 runnable [0x3a15f000]
    java.lang.Thread.State: RUNNABLE
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(SocketInputStream.java:129)
    at oracle.net.ns.Packet.receive(Packet.java:239)
    at oracle.net.ns.DataPacket.receive(DataPacket.java:92)
    at oracle.net.ns.NetInputStream.getNextPacket(NetInputStream.java:172)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:117)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:92)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:77)
    at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:1023)
    at oracle.jdbc.driver.T4CMAREngine.unmarshalSB1(T4CMAREngine.java:999)
    at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:584)
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:194)
    at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:785)
    at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:860)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1186)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3381)
    at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3425)
    - locked <0x09ad05f8> (a oracle.jdbc.driver.T4CConnection)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1490)
    at oracle.dbtools.raptor.controls.grid.ResultSetTableModel.openResultSet(ResultSetTableModel.java:412)
    at oracle.dbtools.raptor.controls.grid.ResultSetTableModel.fetchNext(ResultSetTableModel.java:169)
    at oracle.dbtools.raptor.controls.grid.ResultSetTableModel$4.doWork(ResultSetTableModel.java:556)
    at oracle.dbtools.raptor.controls.grid.ResultSetTableModel$4.doWork(ResultSetTableModel.java:540)
    at oracle.dbtools.raptor.backgroundTask.RaptorTask.call(RaptorTask.java:193)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$RaptorFutureTask.run(RaptorTaskManager.java:492)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:619)
    "AWT-EventQueue-0" prio=6 tid=0x354fac00 nid=0x18d4 waiting for monitor entry [0x3a45f000]
    java.lang.Thread.State: BLOCKED (on object monitor)
    at oracle.jdbc.driver.PhysicalConnection.getMetaData(PhysicalConnection.java:3891)
    - waiting to lock <0x09ad05f8> (a oracle.jdbc.driver.T4CConnection)
    at oracle.dbtools.raptor.plscope.Query.getToolTipText(Query.java:58)
    at oracle.dbtools.raptor.phighlight.TooltipPlugin$1.getToolTipText(TooltipPlugin.java:29)
    at oracle.ide.ceditor.CodeEditor.getToolTipText(CodeEditor.java:1734)
    - locked <0x17245f98> (a java.util.ArrayList)
    at oracle.javatools.editor.BasicEditorPane.getToolTipText(BasicEditorPane.java:1530)
    at javax.swing.ToolTipManager$insideTimerAction.actionPerformed(ToolTipManager.java:658)
    at javax.swing.Timer.fireActionPerformed(Timer.java:271)
    at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
    "Background Parser" prio=6 tid=0x38a43400 nid=0x23c4 waiting on condition [0x39c5f000]
    java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
    at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
    at java.lang.Thread.run(Thread.java:619)
    "SwingWorker-pool-5-thread-1142" prio=6 tid=0x38868800 nid=0x1a7c waiting on condition [0x3820f000]
    java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for <0x0e77bc10> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:358)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)
    "Background Parser" prio=6 tid=0x38a76c00 nid=0x1d18 waiting on condition [0x3a35f000]
    java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
    at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
    at java.lang.Thread.run(Thread.java:619)
    "Background Parser" prio=6 tid=0x387e2800 nid=0xd00 waiting on condition [0x3a25f000]
    java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
    at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
    at java.lang.Thread.run(Thread.java:619)
    "Background Parser" prio=6 tid=0x38752000 nid=0x2794 waiting on condition [0x39e5f000]
    java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
    at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
    at java.lang.Thread.run(Thread.java:619)
    "Swing-Shell" daemon prio=6 tid=0x367f0000 nid=0xd7c waiting on condition [0x3a85f000]
    java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for <0x1069d0d8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:358)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Win32ShellFolderManager2.java:458)
    at java.lang.Thread.run(Thread.java:619)
    "Persistence Auto Flusher" daemon prio=6 tid=0x388a5c00 nid=0x1950 in Object.wait() [0x37e0f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:485)
    at java.util.TimerThread.mainLoop(Timer.java:483)
    - locked <0x0e892d48> (a java.util.TaskQueue)
    at java.util.TimerThread.run(Timer.java:462)
    "Thread-76" prio=6 tid=0x387aec00 nid=0x259c runnable [0x00000000]
    java.lang.Thread.State: RUNNABLE
    "WeakDataReference polling" prio=2 tid=0x38752800 nid=0xe94 in Object.wait() [0x3a05f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
    - locked <0x0b6ba260> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
    at oracle.ide.util.WeakDataReference$Cleaner.run(WeakDataReference.java:88)
    at java.lang.Thread.run(Thread.java:619)
    "Image Animator 3" daemon prio=4 tid=0x3861b400 nid=0x2330 waiting on condition [0x3978f000]
    java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at sun.awt.image.GifFrame.dispose(GifImageDecoder.java:653)
    at sun.awt.image.GifImageDecoder.produceImage(GifImageDecoder.java:230)
    at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:246)
    at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:172)
    at sun.awt.image.ImageFetcher.run(ImageFetcher.java:136)
    "Background Parser" prio=6 tid=0x38348800 nid=0x978 waiting on condition [0x3988f000]
    java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
    at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
    at java.lang.Thread.run(Thread.java:619)
    "TextBufferScavenger" prio=6 tid=0x38324800 nid=0x1af0 in Object.wait() [0x3968f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
    - locked <0x09bb9158> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
    at oracle.ide.model.TextNode$FacadeBufferReference$PollingThread.run(TextNode.java:1949)
    "pool-4-thread-1" prio=6 tid=0x36960400 nid=0x1a84 waiting on condition [0x35a5f000]
    java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for <0x08150a78> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:1963)
    at java.util.concurrent.DelayQueue.take(DelayQueue.java:164)
    at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:583)
    at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:576)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)
    "IconOverlayTracker Timer" prio=6 tid=0x38520c00 nid=0x1b48 in Object.wait() [0x3950f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:485)
    at java.util.TimerThread.mainLoop(Timer.java:483)
    - locked <0x0795f290> (a java.util.TaskQueue)
    at java.util.TimerThread.run(Timer.java:462)
    "Timer queue for AWT thread" daemon prio=6 tid=0x369b4000 nid=0x1f20 in Object.wait() [0x3940f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x077e1358> (a java.lang.Object)
    at java.lang.Object.wait(Object.java:485)
    at ice.util.awt.TimedAWTExecutor.nextElem(TimedAWTExecutor.java:108)
    - locked <0x077e1358> (a java.lang.Object)
    at ice.util.awt.TimedAWTExecutor.runScheduler(TimedAWTExecutor.java:130)
    at ice.util.awt.TimedAWTExecutor$1.run(TimedAWTExecutor.java:19)
    "WaitCursor-Timer" prio=6 tid=0x367c3c00 nid=0x1010 in Object.wait() [0x37b0f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:485)
    at java.util.TimerThread.mainLoop(Timer.java:483)
    - locked <0x077e1400> (a java.util.TaskQueue)
    at java.util.TimerThread.run(Timer.java:462)
    "Native Directory Watcher" prio=2 tid=0x368d4000 nid=0x2334 runnable [0x3830f000]
    java.lang.Thread.State: RUNNABLE
    at oracle.ide.natives.NativeHandler.enterWatcherThread(Native Method)
    at oracle.ide.natives.NativeHandler$2.run(NativeHandler.java:252)
    at java.lang.Thread.run(Thread.java:619)
    "BaseTreeExplorer.NodeOpeningExecutor" prio=6 tid=0x3684b000 nid=0x8b0 waiting on condition [0x3810f000]
    java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for <0x06950af0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:358)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)
    "Scheduler" daemon prio=6 tid=0x36846400 nid=0x14bc in Object.wait() [0x37f0f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:485)
    at oracle.dbtools.raptor.backgroundTask.TaskLinkedList.takeNextTask(TaskLinkedList.java:47)
    - locked <0x06950c70> (a oracle.dbtools.raptor.backgroundTask.TaskLinkedList)
    at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$SchedulerThread.run(RaptorTaskManager.java:422)
    "TimerQueue" daemon prio=6 tid=0x36832800 nid=0x88c in Object.wait() [0x37d0f000]
    java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at javax.swing.TimerQueue.postExpiredTimers(TimerQueue.java:218)
    - locked <0x06950da8> (a javax.swing.TimerQueue)
    at javax.swing.TimerQueue.run(TimerQueue.java:234)
    - locked <0x06950da8> (a javax.swing.TimerQueue)
    at java.lang.Thread.run(Thread.java:619)
    "ChangeSetService" prio=2 tid=0x367fd400 nid=0x2754 in Object.wait() [0x37c0f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x06892cc0> (a oracle.jdevimpl.vcs.changeset.ChangeSetService)
    at java.lang.Object.wait(Object.java:485)
    at oracle.jdevimpl.vcs.changeset.ChangeSetService.awaitEvents(ChangeSetService.java:178)
    - locked <0x06892cc0> (a oracle.jdevimpl.vcs.changeset.ChangeSetService)
    at oracle.jdevimpl.vcs.changeset.ChangeSetService.eventLoop(ChangeSetService.java:199)
    at oracle.jdevimpl.vcs.changeset.ChangeSetService.access$200(ChangeSetService.java:56)
    at oracle.jdevimpl.vcs.changeset.ChangeSetService$2.run(ChangeSetService.java:138)
    at java.lang.Thread.run(Thread.java:619)
    "TimedCache-Timer" daemon prio=6 tid=0x35d52c00 nid=0x2448 in Object.wait() [0x3624f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:485)
    at java.util.TimerThread.mainLoop(Timer.java:483)
    - locked <0x062ab118> (a java.util.TaskQueue)
    at java.util.TimerThread.run(Timer.java:462)
    "JarIndex Timer" daemon prio=6 tid=0x35556400 nid=0x2488 in Object.wait() [0x35d4f000]
    java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.util.TimerThread.mainLoop(Timer.java:509)
    - locked <0x062206e0> (a java.util.TaskQueue)
    at java.util.TimerThread.run(Timer.java:462)
    "AWT-Windows" daemon prio=6 tid=0x354dd000 nid=0x1d0c runnable [0x3595f000]
    java.lang.Thread.State: RUNNABLE
    at sun.awt.windows.WToolkit.eventLoop(Native Method)
    at sun.awt.windows.WToolkit.run(WToolkit.java:291)
    at java.lang.Thread.run(Thread.java:619)
    "AWT-Shutdown" prio=6 tid=0x354a1800 nid=0x268c in Object.wait() [0x3585f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:485)
    at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:259)
    - locked <0x062208d8> (a java.lang.Object)
    at java.lang.Thread.run(Thread.java:619)
    "Java2D Disposer" daemon prio=10 tid=0x354b7400 nid=0x5f4 in Object.wait() [0x3575f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
    - locked <0x06220968> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
    at sun.java2d.Disposer.run(Disposer.java:125)
    at java.lang.Thread.run(Thread.java:619)
    "Low Memory Detector" daemon prio=6 tid=0x00ee1000 nid=0x2664 runnable [0x00000000]
    java.lang.Thread.State: RUNNABLE
    "CompilerThread0" daemon prio=10 tid=0x00edc000 nid=0x1f6c waiting on condition [0x00000000]
    java.lang.Thread.State: RUNNABLE
    "Attach Listener" daemon prio=10 tid=0x00eda800 nid=0x206c runnable [0x00000000]
    java.lang.Thread.State: RUNNABLE
    "Signal Dispatcher" daemon prio=10 tid=0x00ed9400 nid=0xf64 waiting on condition [0x00000000]
    java.lang.Thread.State: RUNNABLE
    "Finalizer" daemon prio=8 tid=0x00ec6c00 nid=0x2348 in Object.wait() [0x34e7f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
    - locked <0x061b0298> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
    "Reference Handler" daemon prio=10 tid=0x00ec5800 nid=0x2484 in Object.wait() [0x34d7f000]
    java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:485)
    at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
    - locked <0x061b0320> (a java.lang.ref.Reference$Lock)
    "main" prio=6 tid=0x009f8000 nid=0x19e0 waiting on condition [0x00000000]
    java.lang.Thread.State: RUNNABLE
    "VM Thread" prio=10 tid=0x00ec1800 nid=0x22e0 runnable
    "VM Periodic Task Thread" prio=10 tid=0x00eec000 nid=0x2604 waiting on condition
    JNI global references: 5312
    Heap
    def new generation total 45376K, used 28499K [0x03080000, 0x061b0000, 0x061b0000)
    eden space 40384K, 67% used [0x03080000, 0x04af44c0, 0x057f0000)
    from space 4992K, 28% used [0x05cd0000, 0x05e30850, 0x061b0000)
    to space 4992K, 0% used [0x057f0000, 0x057f0000, 0x05cd0000)
    tenured generation total 604992K, used 364537K [0x061b0000, 0x2b080000, 0x2b080000)
    the space 604992K, 60% used [0x061b0000, 0x1c5ae548, 0x1c5ae600, 0x2b080000)
    compacting perm gen total 57344K, used 57260K [0x2b080000, 0x2e880000, 0x33080000)
    the space 57344K, 99% used [0x2b080000, 0x2e86b348, 0x2e86b400, 0x2e880000)
    No shared spaces configured.
    Edited by: mdaly on May 21, 2010 11:42 AM

    The cause of hang could be figured out from the thread dump.
    I have fixed that in development code. It was happening from PL/SQL editor trying to create tooltip which locked up the connection.
    I am not sure what would lead to memory bloat even if the tool is not in use. There could be memory leak from some component. I am investigating that.
    Suggest you to keep ObjectViewers, reports & PL/SQL editor closed when not in use.
    Have Sql Array Fetch Size preference to 50 if it's higher.
    Do not have auto-refresh for Report editor.
    Keep Sql History, Find Db Object, Snippets collapsed.
    See if that helps.
    -Raghu

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  • HELP!!! Why do my thread dump have so many locked monitor

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         at java.lang.Thread.run(Thread.java:479)
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         at java.lang.UNIXProcessReaper.run(Native Method)
         at java.lang.Thread.run(Thread.java:479)
    "HighPriority TimeEventGenerator" daemon prio=1 tid=0x825bf18 nid=0x25a1 waiting
    on monitor [0x95dff000..0x95dff890]
         at java.lang.Object.wait(Native Method)
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         at weblogic.time.common.internal.TimeTable.snooze(TimeTable.java:279)
         - locked <53a3bd10> (a weblogic.time.common.internal.TimeTable)
         at weblogic.time.common.internal.TimeEventGenerator.run(TimeEventGenerator.java:141)
         at java.lang.Thread.run(Thread.java:479)
    "ListenThread" prio=1 tid=0x94d00630 nid=0x25a0 runnable [0x95fff000..0x95fff890]
         at java.net.PlainSocketImpl.socketAccept(Native Method)
         at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:463)
         - locked <538fa238> (a java.net.PlainSocketImpl)
         at java.net.ServerSocket.implAccept(ServerSocket.java:238)
         at java.net.ServerSocket.accept(ServerSocket.java:217)
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    "NBExecuteThread-1" daemon prio=1 tid=0x8c0dd1d0 nid=0x259c waiting on monitor
    [0x94521000..0x94521890]
         at java.lang.Object.wait(Native Method)
         - waiting on <537a9650> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <537a9650> (a weblogic.kernel.ExecuteThread)
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    "NBExecuteThread-0" daemon prio=1 tid=0x8c0dc7d0 nid=0x259b waiting on monitor
    [0x94321000..0x94321890]
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         - locked <537a9060> (a weblogic.kernel.ExecuteThread)
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    "ExecuteThread-48" daemon prio=1 tid=0x8c0c3d18 nid=0x2599 waiting for monitor
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    "ExecuteThread-46" daemon prio=1 tid=0x8c0bf410 nid=0x2597 waiting for monitor
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    "ExecuteThread-45" daemon prio=1 tid=0x8c0be9c8 nid=0x2596 waiting on monitor
    [0x93921000..0x93921890]
         at java.lang.Object.wait(Native Method)
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         - locked <537a6df8> (a weblogic.kernel.ExecuteThread)
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    "ExecuteThread-44" daemon prio=1 tid=0x8c0bdab0 nid=0x2595 waiting on monitor
    [0x93721000..0x93721890]
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         - locked <537a6828> (a weblogic.kernel.ExecuteThread)
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    [0x91521000..0x91521890]
         at java.lang.Object.wait(Native Method)
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         - locked <537a0558> (a weblogic.kernel.ExecuteThread)
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    [0x91321000..0x91321890]
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         - locked <5379ff88> (a weblogic.kernel.ExecuteThread)
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    "ExecuteThread-25" daemon prio=1 tid=0x8c079e70 nid=0x2582 waiting on monitor
    [0x91121000..0x91121890]
         at java.lang.Object.wait(Native Method)
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    "ExecuteThread-24" daemon prio=1 tid=0x8c078038 nid=0x2581 waiting on monitor
    [0x90f21000..0x90f21890]
         at java.lang.Object.wait(Native Method)
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         - locked <5379f3e8> (a weblogic.kernel.ExecuteThread)
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    "ExecuteThread-23" daemon prio=1 tid=0x8c0a3298 nid=0x2580 waiting on monitor
    [0x90d21000..0x90d21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379ee18> (a weblogic.kernel.ExecuteThread)
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         - locked <5379ee18> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-22" daemon prio=1 tid=0x8c0e30d8 nid=0x257f waiting on monitor
    [0x90b21000..0x90b21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379e848> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379e848> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-21" daemon prio=1 tid=0x8c0c5948 nid=0x257e waiting on monitor
    [0x90921000..0x90921890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379e278> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379e278> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-20" daemon prio=1 tid=0x8c0d0470 nid=0x257d waiting on monitor
    [0x90721000..0x90721890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379dca8> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379dca8> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-19" daemon prio=1 tid=0x8c080798 nid=0x257c waiting on monitor
    [0x90521000..0x90521890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379d6d8> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379d6d8> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-18" daemon prio=1 tid=0x8c080648 nid=0x257b waiting on monitor
    [0x90321000..0x90321890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379d108> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379d108> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-17" daemon prio=1 tid=0x8c032380 nid=0x257a runnable [0x90121000..0x90121890]
         at java.lang.String.concat(String.java:1553)
         at com.ebao.carcase.bean.query.Query.generatorXML(Query.java:239)
         at com.ebao.carcase.bean.query.Query.generatorXMLByList(Query.java:158)
         at com.ebao.carcase.servlet.common.CommonBean.query(CommonBean.java:652)
         at com.ebao.carcase.servlet.claim.ClaimServlet.doPost(ClaimServlet.java:122)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:772)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:120)
         at weblogic.servlet.ServletServlet.service(ServletServlet.java:46)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:120)
         at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:945)
         at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:909)
         at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextManager.java:269)
         at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:392)
         at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:274)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:130)
    "ExecuteThread-16" daemon prio=1 tid=0x8c0df9a8 nid=0x2579 waiting on monitor
    [0x8ff21000..0x8ff21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379c568> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379c568> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-15" daemon prio=1 tid=0x8c0a6288 nid=0x2578 waiting on monitor
    [0x8fd21000..0x8fd21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379bf98> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379bf98> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-14" daemon prio=1 tid=0x8c0dbd60 nid=0x2577 waiting on monitor
    [0x8fb21000..0x8fb21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379b9c8> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379b9c8> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-13" daemon prio=1 tid=0x8c0c8498 nid=0x2576 waiting on monitor
    [0x8f921000..0x8f921890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379b3f8> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379b3f8> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-12" daemon prio=1 tid=0x8c0a6a28 nid=0x2575 waiting on monitor
    [0x8f721000..0x8f721890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379ae28> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379ae28> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-11" daemon prio=1 tid=0x8c07d348 nid=0x2574 runnable [0x8f521000..0x8f521890]
         at java.lang.System.arraycopy(Native Method)
         at java.lang.String.getChars(String.java:557)
         at java.lang.String.concat(String.java:1554)
         at com.ebao.carcase.bean.query.Query.generatorXML(Query.java:239)
         at com.ebao.carcase.bean.query.Query.generatorXMLByList(Query.java:158)
         at com.ebao.carcase.servlet.common.CommonBean.query(CommonBean.java:652)
         at com.ebao.carcase.servlet.claim.ClaimServlet.doPost(ClaimServlet.java:251)
         at com.ebao.carcase.servlet.claim.ClaimServlet.doGet(ClaimServlet.java:77)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:120)
         at weblogic.servlet.ServletServlet.service(ServletServlet.java:46)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:120)
         at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:945)
         at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:909)
         at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextManager.java:269)
         at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:392)
         at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:274)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:130)
    "ExecuteThread-10" daemon prio=1 tid=0x8c0369b0 nid=0x2571 waiting on monitor
    [0x8f321000..0x8f321890]
         at java.lang.Object.wait(Native Method)
         - waiting on <5379a288> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <5379a288> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-9" daemon prio=1 tid=0x8c079898 nid=0x256f waiting on monitor [0x8f121000..0x8f121890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53799cb8> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <53799cb8> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-8" daemon prio=1 tid=0x8c035260 nid=0x256e waiting on monitor [0x8ef21000..0x8ef21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <537996e8> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <537996e8> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-7" daemon prio=1 tid=0x8c034510 nid=0x256d waiting on monitor [0x8ed21000..0x8ed21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53799118> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <53799118> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-6" daemon prio=1 tid=0x8c081130 nid=0x256c waiting on monitor [0x8eb21000..0x8eb21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53798b48> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <53798b48> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-5" daemon prio=1 tid=0x8c0c7108 nid=0x256b waiting on monitor [0x8e921000..0x8e921890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53798578> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <53798578> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-4" daemon prio=1 tid=0x8c0a4388 nid=0x256a waiting on monitor [0x8e721000..0x8e721890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53797fa8> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <53797fa8> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-3" daemon prio=1 tid=0x8c0367b8 nid=0x2569 waiting on monitor [0x8e521000..0x8e521890]
         at java.lang.Object.wait(Native Method)
         - waiting on <537979d8> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <537979d8> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-2" daemon prio=1 tid=0x8c036290 nid=0x2568 waiting on monitor [0x8e321000..0x8e321890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53797408> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <53797408> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-1" daemon prio=1 tid=0x8c0a4ee0 nid=0x2567 waiting on monitor [0x8e121000..0x8e121890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53796e38> (a weblogic.kernel.ExecuteThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
         - locked <53796e38> (a weblogic.kernel.ExecuteThread)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-0" daemon prio=1 tid=0x8c0a4550 nid=0x2566 runnable [0x8df21000..0x8df21890]
         at java.lang.String.concat(String.java:1553)
         at com.ebao.carcase.bean.query.Query.generatorXML(Query.java:239)
         at com.ebao.carcase.bean.query.Query.generatorXMLByList(Query.java:158)
         at com.ebao.carcase.servlet.common.CommonBean.query(CommonBean.java:652)
         at com.ebao.carcase.servlet.end.EndCaseServlet.service(EndCaseServlet.java:56)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:120)
         at weblogic.servlet.ServletServlet.service(ServletServlet.java:46)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:120)
         at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:945)
         at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:909)
         at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextManager.java:269)
         at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:392)
         at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:274)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:130)
    "TimeEventGenerator" daemon prio=1 tid=0x8c076008 nid=0x2565 waiting on monitor
    [0x8dd21000..0x8dd21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53795330> (a weblogic.time.common.internal.TimeTable)
         at weblogic.time.common.internal.TimeTable.snooze(TimeTable.java:279)
         - locked <53795330> (a weblogic.time.common.internal.TimeTable)
         at weblogic.time.common.internal.TimeEventGenerator.run(TimeEventGenerator.java:141)
         at java.lang.Thread.run(Thread.java:479)
    "SpinnerRandomSource" daemon prio=1 tid=0x8c0b34a0 nid=0x2563 waiting on monitor
    [0x8db21000..0x8db21890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53793040> (a weblogic.security.SpinnerThread)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.security.SpinnerThread.stopSpinning(SpinnerRandomBitsSource.java:104)
         - locked <53793040> (a weblogic.security.SpinnerThread)
         at weblogic.security.SpinnerThread.run(SpinnerRandomBitsSource.java:121)
    "Signal Dispatcher" daemon prio=1 tid=0x8c0077e8 nid=0x2561 waiting on monitor
    [0..0]
    "Finalizer" daemon prio=1 tid=0x8c000540 nid=0x255e waiting on monitor [0x8c2ff000..0x8c2ff890]
         at java.lang.Object.wait(Native Method)
         - waiting on <537202f8> (a java.lang.ref.ReferenceQueue$Lock)
         at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:103)
         - locked <537202f8> (a java.lang.ref.ReferenceQueue$Lock)
         at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
         at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:157)
    "Reference Handler" daemon prio=1 tid=0x80851f0 nid=0x255d waiting on monitor
    [0x8bf8c000..0x8bf8c890]
         at java.lang.Object.wait(Native Method)
         - waiting on <53720208> (a java.lang.ref.Reference$Lock)
         at java.lang.Object.wait(Object.java:415)
         at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:105)
         - locked <53720208> (a java.lang.ref.Reference$Lock)
    "main" prio=1 tid=0x804ead0 nid=0x2543 waiting on monitor [0xbfffc000..0xbfffd00c]
         at java.lang.Object.wait(Native Method)
         - waiting on <53743c20> (a weblogic.t3.srvr.T3Srvr)
         at java.lang.Object.wait(Object.java:415)
         at weblogic.t3.srvr.T3Srvr.waitForDeath(T3Srvr.java:1958)
         - locked <53743c20> (a weblogic.t3.srvr.T3Srvr)
         at java.lang.reflect.Method.invoke(Native Method)
         at weblogic.Server.startServerDynamically(Server.java:148)
         at weblogic.Server.main(Server.java:97)
         at weblogic.Server.main(Server.java:58)
    "VM Thread" prio=1 tid=0x8082110 nid=0x255c runnable
    "VM Periodic Task Thread" prio=1 tid=0x8c0064f8 nid=0x255f waiting on monitor
    "Suspend Checker Thread" prio=1 tid=0x8c006e30 nid=0x2560 runnable

    These are execute threads waiting for requests to come in.
    BTW, you probably want to look into using StringBuffer instead of
    strings concatenation in com.ebao.carcase.bean.query.Query.generatorXML.
    "min.lu" <[email protected]> wrote in message
    news:[email protected]...
    >
    In recent weeks, My customer's weblogic server become more busy.Each timeI downloaded
    the thread dump when CPU is busy than 90%,I found a lot of lock in thethread
    dump! Especially the class named "weblogic.kernel.ExecuteThread" . It'sthe kernel
    class of weblogic, Why were most of them locked?
    Full thread dump:
    "process forker" daemon prio=1 tid=0x95b4c8e0 nid=0x3084 waiting onmonitor [0x977ff000..0x977ff890]
    at java.lang.Object.wait(Native Method)
    - waiting on <53d26420> (a java.lang.Object)
    at java.lang.UNIXProcessForker.run(Native Method)
    at java.lang.Thread.run(Thread.java:479)
    "process reaper" daemon prio=1 tid=0x95376758 nid=0x3083 runnable[0x96eff000..0x96eff890]
    at java.lang.UNIXProcessReaper.run(Native Method)
    at java.lang.Thread.run(Thread.java:479)
    "HighPriority TimeEventGenerator" daemon prio=1 tid=0x825bf18 nid=0x25a1waiting
    on monitor [0x95dff000..0x95dff890]
    at java.lang.Object.wait(Native Method)
    - waiting on <53a3bd10> (a weblogic.time.common.internal.TimeTable)
    at weblogic.time.common.internal.TimeTable.snooze(TimeTable.java:279)
    - locked <53a3bd10> (a weblogic.time.common.internal.TimeTable)
    atweblogic.time.common.internal.TimeEventGenerator.run(TimeEventGenerator.java
    :141)
    at java.lang.Thread.run(Thread.java:479)
    "ListenThread" prio=1 tid=0x94d00630 nid=0x25a0 runnable[0x95fff000..0x95fff890]
    at java.net.PlainSocketImpl.socketAccept(Native Method)
    at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:463)
    - locked <538fa238> (a java.net.PlainSocketImpl)
    at java.net.ServerSocket.implAccept(ServerSocket.java:238)
    at java.net.ServerSocket.accept(ServerSocket.java:217)
    atweblogic.socket.WeblogicServerSocket.accept(WeblogicServerSocket.java:26)
    at weblogic.t3.srvr.ListenThread.run(ListenThread.java:325)
    "NBExecuteThread-1" daemon prio=1 tid=0x8c0dd1d0 nid=0x259c waiting onmonitor
    [0x94521000..0x94521890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a9650> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a9650> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "NBExecuteThread-0" daemon prio=1 tid=0x8c0dc7d0 nid=0x259b waiting onmonitor
    [0x94321000..0x94321890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a9060> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a9060> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    //"ExecuteThread-49" daemon prio=1 tid=0x8c034660 nid=0x259a runnable[0x94121000..0x94121890]
    at java.net.PlainDatagramSocketImpl.peek(Native Method)
    - locked <537acf60> (a java.net.PlainDatagramSocketImpl)
    at java.net.DatagramSocket.receive(DatagramSocket.java:349)
    - locked <486f9980> (a java.net.DatagramPacket)
    - locked <537acf40> (a java.net.MulticastSocket)
    at weblogic.cluster.TDMSocketIPM.receive(TDMSocketIPM.java:86)
    at weblogic.cluster.TMSocket.execute(TMSocket.java:249)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:130)
    "ExecuteThread-48" daemon prio=1 tid=0x8c0c3d18 nid=0x2599 waiting formonitor
    entry [0x93f21000..0x93f21890]
    atweblogic.socket.PosixSocketMuxer.processSockets(PosixSocketMuxer.java:290)
    - waiting to lock <538fa5c8> (a java.lang.Object)
    atweblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:42)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:130)
    "ExecuteThread-47" daemon prio=1 tid=0x8c0c32d0 nid=0x2598 runnable[0x93d21000..0x93d21890]
    at weblogic.socket.PosixSocketMuxer.poll(Native Method)
    atweblogic.socket.PosixSocketMuxer.processSockets(PosixSocketMuxer.java:290)
    - locked <538fa5c8> (a java.lang.Object)
    atweblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:42)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:130)
    "ExecuteThread-46" daemon prio=1 tid=0x8c0bf410 nid=0x2597 waiting formonitor
    entry [0x93b21000..0x93b21890]
    atweblogic.socket.PosixSocketMuxer.processSockets(PosixSocketMuxer.java:290)
    - waiting to lock <538fa5c8> (a java.lang.Object)
    atweblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:42)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:130)
    "ExecuteThread-45" daemon prio=1 tid=0x8c0be9c8 nid=0x2596 waiting onmonitor
    [0x93921000..0x93921890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a6df8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a6df8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-44" daemon prio=1 tid=0x8c0bdab0 nid=0x2595 waiting onmonitor
    [0x93721000..0x93721890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a6828> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a6828> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-43" daemon prio=1 tid=0x8c0bd068 nid=0x2594 waiting onmonitor
    [0x93521000..0x93521890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a6258> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a6258> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-42" daemon prio=1 tid=0x8c0c0ce0 nid=0x2593 waiting onmonitor
    [0x93321000..0x93321890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a5c88> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a5c88> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-41" daemon prio=1 tid=0x8c0c0298 nid=0x2592 waiting onmonitor
    [0x93121000..0x93121890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a56b8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a56b8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-40" daemon prio=1 tid=0x8c0a21e0 nid=0x2591 waiting onmonitor
    [0x92f21000..0x92f21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a50e8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a50e8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-39" daemon prio=1 tid=0x8c0d4520 nid=0x2590 waiting onmonitor
    [0x92d21000..0x92d21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a4b18> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a4b18> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-38" daemon prio=1 tid=0x8c0d43d0 nid=0x258f waiting onmonitor
    [0x92b21000..0x92b21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a4548> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a4548> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-37" daemon prio=1 tid=0x8c0d3988 nid=0x258e waiting onmonitor
    [0x92921000..0x92921890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a3f78> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a3f78> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-36" daemon prio=1 tid=0x8c0ded20 nid=0x258d waiting onmonitor
    [0x92721000..0x92721890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a39a8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a39a8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-35" daemon prio=1 tid=0x8c0de2d8 nid=0x258c waiting onmonitor
    [0x92521000..0x92521890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a33d8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a33d8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-34" daemon prio=1 tid=0x8c0cd528 nid=0x258b waiting onmonitor
    [0x92321000..0x92321890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a2e08> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a2e08> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-33" daemon prio=1 tid=0x8c0ccae0 nid=0x258a waiting onmonitor
    [0x92121000..0x92121890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a2838> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a2838> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-32" daemon prio=1 tid=0x8c075360 nid=0x2589 waiting onmonitor
    [0x91f21000..0x91f21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a2268> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a2268> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-31" daemon prio=1 tid=0x8c0837d0 nid=0x2588 waiting onmonitor
    [0x91d21000..0x91d21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a1c98> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a1c98> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-30" daemon prio=1 tid=0x8c0a5628 nid=0x2587 waiting onmonitor
    [0x91b21000..0x91b21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a16c8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a16c8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-29" daemon prio=1 tid=0x8c07aaf8 nid=0x2586 waiting onmonitor
    [0x91921000..0x91921890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a10f8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a10f8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-28" daemon prio=1 tid=0x8c0c23d0 nid=0x2585 waiting onmonitor
    [0x91721000..0x91721890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a0b28> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a0b28> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-27" daemon prio=1 tid=0x8c0c1988 nid=0x2584 waiting onmonitor
    [0x91521000..0x91521890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537a0558> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537a0558> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-26" daemon prio=1 tid=0x8c07ca00 nid=0x2583 waiting onmonitor
    [0x91321000..0x91321890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379ff88> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379ff88> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-25" daemon prio=1 tid=0x8c079e70 nid=0x2582 waiting onmonitor
    [0x91121000..0x91121890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379f9b8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379f9b8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-24" daemon prio=1 tid=0x8c078038 nid=0x2581 waiting onmonitor
    [0x90f21000..0x90f21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379f3e8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379f3e8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-23" daemon prio=1 tid=0x8c0a3298 nid=0x2580 waiting onmonitor
    [0x90d21000..0x90d21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379ee18> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379ee18> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-22" daemon prio=1 tid=0x8c0e30d8 nid=0x257f waiting onmonitor
    [0x90b21000..0x90b21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379e848> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379e848> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-21" daemon prio=1 tid=0x8c0c5948 nid=0x257e waiting onmonitor
    [0x90921000..0x90921890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379e278> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379e278> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-20" daemon prio=1 tid=0x8c0d0470 nid=0x257d waiting onmonitor
    [0x90721000..0x90721890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379dca8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379dca8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-19" daemon prio=1 tid=0x8c080798 nid=0x257c waiting onmonitor
    [0x90521000..0x90521890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379d6d8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379d6d8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-18" daemon prio=1 tid=0x8c080648 nid=0x257b waiting onmonitor
    [0x90321000..0x90321890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379d108> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379d108> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-17" daemon prio=1 tid=0x8c032380 nid=0x257a runnable[0x90121000..0x90121890]
    at java.lang.String.concat(String.java:1553)
    at com.ebao.carcase.bean.query.Query.generatorXML(Query.java:239)
    at com.ebao.carcase.bean.query.Query.generatorXMLByList(Query.java:158)
    at com.ebao.carcase.servlet.common.CommonBean.query(CommonBean.java:652)
    atcom.ebao.carcase.servlet.claim.ClaimServlet.doPost(ClaimServlet.java:122)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:772)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
    atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
    :120)
    at weblogic.servlet.ServletServlet.service(ServletServlet.java:46)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
    atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
    :120)
    atweblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp
    l.java:945)
    atweblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp
    l.java:909)
    atweblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContext
    Manager.java:269)
    atweblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:392)
    at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:274)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:130)
    "ExecuteThread-16" daemon prio=1 tid=0x8c0df9a8 nid=0x2579 waiting onmonitor
    [0x8ff21000..0x8ff21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379c568> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379c568> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-15" daemon prio=1 tid=0x8c0a6288 nid=0x2578 waiting onmonitor
    [0x8fd21000..0x8fd21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379bf98> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379bf98> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-14" daemon prio=1 tid=0x8c0dbd60 nid=0x2577 waiting onmonitor
    [0x8fb21000..0x8fb21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379b9c8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379b9c8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-13" daemon prio=1 tid=0x8c0c8498 nid=0x2576 waiting onmonitor
    [0x8f921000..0x8f921890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379b3f8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379b3f8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-12" daemon prio=1 tid=0x8c0a6a28 nid=0x2575 waiting onmonitor
    [0x8f721000..0x8f721890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379ae28> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379ae28> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-11" daemon prio=1 tid=0x8c07d348 nid=0x2574 runnable[0x8f521000..0x8f521890]
    at java.lang.System.arraycopy(Native Method)
    at java.lang.String.getChars(String.java:557)
    at java.lang.String.concat(String.java:1554)
    at com.ebao.carcase.bean.query.Query.generatorXML(Query.java:239)
    at com.ebao.carcase.bean.query.Query.generatorXMLByList(Query.java:158)
    at com.ebao.carcase.servlet.common.CommonBean.query(CommonBean.java:652)
    atcom.ebao.carcase.servlet.claim.ClaimServlet.doPost(ClaimServlet.java:251)
    at com.ebao.carcase.servlet.claim.ClaimServlet.doGet(ClaimServlet.java:77)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
    atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
    :120)
    at weblogic.servlet.ServletServlet.service(ServletServlet.java:46)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
    atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
    :120)
    atweblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp
    l.java:945)
    atweblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp
    l.java:909)
    atweblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContext
    Manager.java:269)
    atweblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:392)
    at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:274)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:130)
    "ExecuteThread-10" daemon prio=1 tid=0x8c0369b0 nid=0x2571 waiting onmonitor
    [0x8f321000..0x8f321890]
    at java.lang.Object.wait(Native Method)
    - waiting on <5379a288> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <5379a288> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-9" daemon prio=1 tid=0x8c079898 nid=0x256f waiting onmonitor [0x8f121000..0x8f121890]
    at java.lang.Object.wait(Native Method)
    - waiting on <53799cb8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <53799cb8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-8" daemon prio=1 tid=0x8c035260 nid=0x256e waiting onmonitor [0x8ef21000..0x8ef21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537996e8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537996e8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-7" daemon prio=1 tid=0x8c034510 nid=0x256d waiting onmonitor [0x8ed21000..0x8ed21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <53799118> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <53799118> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-6" daemon prio=1 tid=0x8c081130 nid=0x256c waiting onmonitor [0x8eb21000..0x8eb21890]
    at java.lang.Object.wait(Native Method)
    - waiting on <53798b48> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <53798b48> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-5" daemon prio=1 tid=0x8c0c7108 nid=0x256b waiting onmonitor [0x8e921000..0x8e921890]
    at java.lang.Object.wait(Native Method)
    - waiting on <53798578> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <53798578> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-4" daemon prio=1 tid=0x8c0a4388 nid=0x256a waiting onmonitor [0x8e721000..0x8e721890]
    at java.lang.Object.wait(Native Method)
    - waiting on <53797fa8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <53797fa8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-3" daemon prio=1 tid=0x8c0367b8 nid=0x2569 waiting onmonitor [0x8e521000..0x8e521890]
    at java.lang.Object.wait(Native Method)
    - waiting on <537979d8> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <537979d8> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-2" daemon prio=1 tid=0x8c036290 nid=0x2568 waiting onmonitor [0x8e321000..0x8e321890]
    at java.lang.Object.wait(Native Method)
    - waiting on <53797408> (a weblogic.kernel.ExecuteThread)
    at java.lang.Object.wait(Object.java:415)
    at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:100)
    - locked <53797408> (a weblogic.kernel.ExecuteThread)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:127)
    "ExecuteThread-1" daemon prio=1 tid=0x8c0a4ee0 nid=0x2567 waiting onmonitor [0x8e121000..0x8e121890]
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    Mads
    PS. I noticed that you recommended slackware for old kernels in another thread. I'm however in a bit different situation as I need old versions of glibc. Furthermore I would prefer sticking to arch, but was wondering whether there were any specific reasons for not doing that.

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