Java.sql functions hanging for 60 seconds

I have an Oracle 8.1.6 application on Solaris with Tomcat 3.1 using JDBC to talk to the database. I am using the thin driver for JDK 1.2.2. I moved a box from development to production and changed the network information in the database and in Solaris. Now I have strange behavior where about 5% of the time functions such as Connection.prepareStatement, ResultSet.close, and PreparedStatement.close will sleep for 60 seconds. Then they proceed as normal. It is always 60 seconds, never a hard deadlock. The application is multithreaded, being inside Tomcat and all. The other strange behavior is that when another thread accesses the database, the first thread that was sleeping will wake up and proceed as normal. I will try to switch to the OCI driver, but I think it is very strange that the thread hangs for exactly 60 seconds inside the calls to the JDBC driver. The other 95% of the time it works great.

We switched the driver to OCI instead of thin. It looks like it is working OK now. I suppose it was some strange behavior in the thin driver.

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Message was edited by:
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Message was edited by:
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<quote>â¦ only on row #40, the internet connection is lost. The only way the user can tell what happened is to look at the entire screen and reverify ALL the data in order to tell what got saved/resaved and what didn't</quote>
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java.lang.Thread.State: RUNNABLE
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java.lang.Thread.State: WAITING (parking)
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at oracle.ide.status.StatusExecutor$StatusQueue.take(StatusExecutor.java:291)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
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java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:139)
at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
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java.lang.Thread.State: WAITING (on object monitor)
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- waiting on <0x08554ba8> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
- locked <0x08554ba8> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
at oracle.ide.util.WeakDataReference$Cleaner.run(WeakDataReference.java:88)
at java.lang.Thread.run(Thread.java:619)
"Background Parser" prio=6 tid=0x35d00400 nid=0xe1c waiting on condition [0x37e2f000..0x37e2fc94]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:139)
at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
at java.lang.Thread.run(Thread.java:619)
"TextBufferScavenger" prio=6 tid=0x35df1c00 nid=0xabc in Object.wait() [0x37c2f000..0x37c2fd94]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x0842dfe0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
- locked <0x0842dfe0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
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java.lang.Thread.State: TIMED_WAITING (parking)
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java.lang.Thread.State: WAITING (on object monitor)
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at java.lang.Object.wait(Object.java:485)
at java.util.TimerThread.mainLoop(Timer.java:483)
- locked <0x07b36968> (a java.util.TaskQueue)
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"Timer queue for AWT thread" daemon prio=6 tid=0x34913c00 nid=0xdfc in Object.wait() [0x3772f000..0x3772fd94]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x075b5cc8> (a java.lang.Object)
at java.lang.Object.wait(Object.java:485)
at ice.util.awt.TimedAWTExecutor.nextElem(TimedAWTExecutor.java:108)
- locked <0x075b5cc8> (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=0x35ca5800 nid=0x1230 in Object.wait() [0x3752f000..0x3752fa14]
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 <0x0719c1c0> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:462)
"Timer queue for AWT thread" daemon prio=6 tid=0x35a1f800 nid=0x1444 in Object.wait() [0x3692f000..0x3692fb14]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x0719c240> (a java.lang.Object)
at java.lang.Object.wait(Object.java:485)
at ice.util.awt.TimedAWTExecutor.nextElem(TimedAWTExecutor.java:108)
- locked <0x0719c240> (a java.lang.Object)
at ice.util.awt.TimedAWTExecutor.runScheduler(TimedAWTExecutor.java:130)
at ice.util.awt.TimedAWTExecutor$1.run(TimedAWTExecutor.java:19)
"pool-2-thread-1" prio=6 tid=0x35a75800 nid=0x135c waiting on condition [0x3742f000..0x3742fc14]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x06d72e80> (a java.util.concurrent.SynchronousQueue$TransferStack)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:422)
at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:323)
at java.util.concurrent.SynchronousQueue.take(SynchronousQueue.java:857)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
"BaseTreeExplorer.NodeOpeningExecutor" prio=6 tid=0x359c6800 nid=0x1618 waiting on condition [0x3732f000..0x3732fc94]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x06d492a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$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=0x35a44400 nid=0x131c in Object.wait() [0x3722f000..0x3722fd14]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x06d493e0> (a oracle.dbtools.raptor.backgroundTask.TaskLinkedList)
at java.lang.Object.wait(Object.java:485)
at oracle.dbtools.raptor.backgroundTask.TaskLinkedList.takeNextTask(TaskLinkedList.java:47)
- locked <0x06d493e0> (a oracle.dbtools.raptor.backgroundTask.TaskLinkedList)
at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$SchedulerThread.run(RaptorTaskManager.java:429)
"Thread-8" daemon prio=6 tid=0x35a01400 nid=0x1390 in Object.wait() [0x3712f000..0x3712fd94]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x06d49460> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
- locked <0x06d49460> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
at org.tmatesoft.svn.core.javahl.SVNClientImplTracker.run(SVNClientImplTracker.java:65)
at java.lang.Thread.run(Thread.java:619)
"ChangeSetService" prio=2 tid=0x3595dc00 nid=0x11d8 in Object.wait() [0x3682f000..0x3682fa94]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x06a26d80> (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 <0x06a26d80> (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)
"Thread-6" daemon prio=6 tid=0x3590e400 nid=0x1520 runnable [0x36b2f000..0x36b2fb14]
java.lang.Thread.State: RUNNABLE
at sun.print.Win32PrintServiceLookup.notifyPrinterChange(Native Method)
at sun.print.Win32PrintServiceLookup.access$100(Win32PrintServiceLookup.java:32)
at sun.print.Win32PrintServiceLookup$PrinterChangeListener.run(Win32PrintServiceLookup.java:302)
"TimerQueue" daemon prio=6 tid=0x330a9c00 nid=0x11b0 in Object.wait() [0x3672f000..0x3672fc94]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at javax.swing.TimerQueue.run(TimerQueue.java:236)
- locked <0x06887680> (a javax.swing.TimerQueue)
at java.lang.Thread.run(Thread.java:619)
"TimedCache-Timer" daemon prio=6 tid=0x33a85000 nid=0x76c in Object.wait() [0x3460f000..0x3460fa94]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x05f36890> (a java.util.TaskQueue)
at java.util.TimerThread.mainLoop(Timer.java:509)
- locked <0x05f36890> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:462)
"JarIndex Timer" daemon prio=6 tid=0x33a83c00 nid=0x15a8 in Object.wait() [0x3410f000..0x3410fb14]
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 <0x05e824b0> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:462)
"AWT-EventQueue-0" prio=6 tid=0x33a6a400 nid=0x15e8 in Object.wait() [0x3400f000..0x3400fb94]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:485)
at com.sun.tools.jdi.TargetVM.waitForReply(TargetVM.java:281)
- locked <0x02fa0320> (a com.sun.tools.jdi.Packet)
at com.sun.tools.jdi.VirtualMachineImpl.waitForTargetReply(VirtualMachineImpl.java:1015)
at com.sun.tools.jdi.PacketStream.waitForReply(PacketStream.java:51)
at com.sun.tools.jdi.JDWP$Method$LineTable.waitForReply(JDWP.java:3651)
at com.sun.tools.jdi.JDWP$Method$LineTable.process(JDWP.java:3627)
at com.sun.tools.jdi.ConcreteMethodImpl.getBaseLocations(ConcreteMethodImpl.java:343)
at com.sun.tools.jdi.ConcreteMethodImpl.getLocations(ConcreteMethodImpl.java:262)
at com.sun.tools.jdi.ConcreteMethodImpl.locationsOfLine(ConcreteMethodImpl.java:120)
at com.sun.tools.jdi.ReferenceTypeImpl.locationsOfLine(ReferenceTypeImpl.java:893)
at oracle.jdevimpl.debugger.jdi.DebugJDI.getLocationsOfLine(DebugJDI.java:5254)
at oracle.jdevimpl.debugger.jdi.DebugJDIBreakpointFileLine.verify(DebugJDIBreakpointFileLine.java:71)
at oracle.jdevimpl.debugger.jdi.DebugJDIBreakpointPackageFileLine.verify(DebugJDIBreakpointPackageFileLine.java:83)
at oracle.jdevimpl.debugger.jdi.DebugJDI.breakpointAfterChange(DebugJDI.java:2546)
- locked <0x09721d70> (a oracle.jdevimpl.debugger.jdi.DebugJDI)
at oracle.jdevimpl.debugger.jdi.DebugJDIBreakpoint.afterChange(DebugJDIBreakpoint.java:386)
at oracle.jdevimpl.debugger.jdi.DebugJDI.putBreakpoint(DebugJDI.java:2426)
- locked <0x09721d70> (a oracle.jdevimpl.debugger.jdi.DebugJDI)
at oracle.jdevimpl.debugger.jdi.DebugJDI.putBreakpointPackageFileLine(DebugJDI.java:893)
- locked <0x09721d70> (a oracle.jdevimpl.debugger.jdi.DebugJDI)
at oracle.jdevimpl.runner.debug.Breakpoint.putBreakpoint(Breakpoint.java:1701)
at oracle.jdevimpl.runner.debug.DebuggingProcess.afterConnection(DebuggingProcess.java:1352)
at oracle.jdevimpl.runner.debug.DebuggingProcess.accept(DebuggingProcess.java:1704)
at oracle.jdevimpl.runner.debug.DebuggingListener$2.run(DebuggingListener.java:231)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
"AWT-Windows" daemon prio=6 tid=0x33a64000 nid=0x12e8 runnable [0x33e0f000..0x33e0fc94]
java.lang.Thread.State: RUNNABLE
at sun.awt.windows.WToolkit.eventLoop(Native Method)
at sun.awt.windows.WToolkit.run(WToolkit.java:291)
at java.lang.Thread.run(Thread.java:619)
"AWT-Shutdown" prio=6 tid=0x33a31c00 nid=0xd4c in Object.wait() [0x33d0f000..0x33d0fd14]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x05e826a0> (a java.lang.Object)
at java.lang.Object.wait(Object.java:485)
at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:259)
- locked <0x05e826a0> (a java.lang.Object)
at java.lang.Thread.run(Thread.java:619)
"Java2D Disposer" daemon prio=10 tid=0x33a41400 nid=0x1294 in Object.wait() [0x33c0f000..0x33c0fd94]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x05e82730> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
- locked <0x05e82730> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
at sun.java2d.Disposer.run(Disposer.java:125)
at java.lang.Thread.run(Thread.java:619)
"Low Memory Detector" daemon prio=6 tid=0x33076000 nid=0x688 runnable [0x00000000..0x00000000]
java.lang.Thread.State: RUNNABLE
"CompilerThread0" daemon prio=10 tid=0x3306fc00 nid=0x910 waiting on condition [0x00000000..0x336df7bc]
java.lang.Thread.State: RUNNABLE
"Attach Listener" daemon prio=10 tid=0x3306e400 nid=0x162c runnable [0x00000000..0x00000000]
java.lang.Thread.State: RUNNABLE
"Signal Dispatcher" daemon prio=10 tid=0x3306d000 nid=0x17a4 waiting on condition [0x00000000..0x00000000]
java.lang.Thread.State: RUNNABLE
"Finalizer" daemon prio=8 tid=0x3305d400 nid=0xe3c in Object.wait() [0x333df000..0x333dfc94]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x05e00298> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
- locked <0x05e00298> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
"Reference Handler" daemon prio=10 tid=0x33058800 nid=0x1228 in Object.wait() [0x332df000..0x332dfd14]
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$ReferenceHandler.run(Reference.java:116)
- locked <0x05e00320> (a java.lang.ref.Reference$Lock)
"main" prio=6 tid=0x00bc7c00 nid=0x10e0 waiting on condition [0x00000000..0x0012fae8]
java.lang.Thread.State: RUNNABLE
"VM Thread" prio=10 tid=0x33055000 nid=0x194 runnable
"VM Periodic Task Thread" prio=10 tid=0x33077800 nid=0xfd0 waiting on condition
JNI global references: 2649
Heap
def new generation total 9216K, used 3904K [0x02cd0000, 0x036c0000, 0x05e00000)
eden space 8256K, 35% used [0x02cd0000, 0x02fb0330, 0x034e0000)
from space 960K, 100% used [0x035d0000, 0x036c0000, 0x036c0000)
to space 960K, 0% used [0x034e0000, 0x034e0000, 0x035d0000)
tenured generation total 121024K, used 61455K [0x05e00000, 0x0d430000, 0x2acd0000)
the space 121024K, 50% used [0x05e00000, 0x09a03eb0, 0x09a04000, 0x0d430000)
compacting perm gen total 71168K, used 70950K [0x2acd0000, 0x2f250000, 0x32cd0000)
the space 71168K, 99% used [0x2acd0000, 0x2f219bf8, 0x2f219c00, 0x2f250000)
No shared spaces configured.
Edited by: 910659 on Jan 27, 2012 7:45 AM

What I mean is that I put the connect_tcp command inside the package function I want to debug in order to ensure it's going to remain in the same session. e.g.:
Function GetValue Return Varchar2 Is
Begin
dbms_debug_jdwp.connect_tcp('xxx.xxx.xxx.xxx', '25255');
return 'My Value';
End;
I'm afraid I cannot post our code which causes this problem due to our information security policies and simple console and web applications failed to replicate the problem. The function creates a connection to Oracle SQL Developer (which can be seen in the environment with the small ladybug icon) if no breakpoints are set which obviously doesn't allow breaking into the function. However if a breakpoint is also specified in the Return line the connection seems to freeze Oracle SQL Developer. No ladybug icon is shown and no Remote Debug Session seems to open.

Java.sql functions hanging for 60 seconds

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