Monitoring JVM in 11i

Hi Friends ,
We are on 11.5.10.2 running on RHEL 5, we have recently migrated to linux from windows 2003 server, now we are facing
java.lang.OutOfMemoryError errors in Apache . please help in finding a tool to monitor JVMs on 11i system.
Thanks
Raghu

Hi Rag;
Please check below thread:
Re: Monitor JVM on Oracle AS Form and Reports
Re: REG: Cloning
also check this search:
http://forums.oracle.com/forums/search.jspa?threadID=&q=tools+to+monitor+JVM+activilty&objID=c84&dateRange=all&userID=&numResults=15
Hope it helps
Regard
Helios

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Working wlst script on weblogic 10.3 for monitoring jvm,jdbc,serverstate,et

H team,
please provide me working wlst script on weblogic 10.3 on for monitoring jvm,jdbc,server state, threads, etc.
UNIX OS: solaris X86
email id: [email protected]
thanks
surya

H team,
please provide me working wlst script on weblogic 10.3 on for monitoring jvm,jdbc,server state, threads, etc.
UNIX OS: solaris X86
email id: [email protected]
thanks
surya

Monitoring JVM

Hei,
We are a group of students who work on a project for a company. We are trying to monitor JVM using java plungins in a munin server. The problem is tha values that we get are non changable even if we load our JVM, in contrary of the JConsole, all the values of JVM changes constantly. What seems to be the problem? Please help!
Here is an example of the java code we used:
String nyclasser=ManagementFactory.GARBAGE_COLLECTOR_MXBE AN_DOMAIN_TYPE;
RuntimeMXBean mxbean = ManagementFactory.getRuntimeMXBean();
List<MemoryManagerMXBean> ny=ManagementFactory.getMemoryManagerMXBeans();
CompilationMXBean CMXbean=ManagementFactory.getCompilationMXBean();
int stor=ny.size();
System.out.println("getboootClassPath------->"+mxbean.getBootClassPath()+"\ngetLibraryPath------>"+mxbean.getLibraryPath()+"\nGARBAGE_COLLECTOR_MX BEAN_DOMAIN_TYPE----->"+nyclasser+"\nsize------>"+stor+"\ngetManagementSpeceVersion----->"+mxbean.getManagementSpecVersion()+"\ngetName---------->"+mxbean.getName()+"\ngetVmVersion---->"+mxbean.getVmVersion()+"\ngetVmVendor----->"+mxbean.getVmVendor());
System.out.println("getStartTime------>"+mxbean.getStartTime()+"\nisBootClassPathSupport ed------>"+mxbean.isBootClassPathSupported());
System.out.println("CompilationMXBean.getName----->"+CMXbean.getName()+"\nCompilationMXBean.getTotal ComilationTime---->"+CMXbean.getTotalCompilationTime());
foreach(MemoryManagerMXBean m in ny)
In JConsole we get a list of applications to choose to monitor , how can we do the equivalent in our little application ?

I think you're talking about JMX and/or VisualVM.
http://visualvm.java.net/

Monitor JVM on AIX box

How to monitor JVM usage on a particulat time.( other than NWA charts ).
at OS level. System is PI 7.0
Thanks
Ssk

I think you can use Jconsole (Never had the need to use it myself)
http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html
Regards
Juan

Monitor JVM on AIX

How to monitor JVM on AIX box?

Hello Nwuser8880
I have moved this thread to the Netweaver Administrator forum (this is not a PI technical issue). I think you have a better chance of getting a quality answer to your query in the Netweaver Administrator forum.
Regards
Mark Smyth
XI/PI Moderator

Monitoring JVM Parameters

Hi All,
Is there a ways to monitor/change JVM parameters at runtime?
Example
If I pass a custom jvm parameter in the following way:
java -Dmy.custom.argument=myvalue -jar Stylepad.jarIs there a way to monitor this argument (-Dmy.custom.argument=myvalue) at runtime with both read and write permissions?
As far as I know the platform management mbeans only allows us to view such jvm parameters in read only mode (via java.lang.Runtime MBean).
Could any one help me to solve this problem?
Thanks in Advance!
Jini

Hi,
You could write your own MBean to do so.
However you should be careful about security: if your MBean allows to change just
any System property and isn't protected then you would be creating a security hole.
There's also a second consideration, which is that changing the value of a System
property at runtime might have no effect: it would mostly depends on how the code
that depends on that System property uses it.
Most applications will read their property only once, at initialization time. Changing
a property after such an application has performed its initialization phase has usually
no effect on that application.
On a pure conceptual/general level I would be tempted to qualify what you are
asking for as 'fragile' (best case) or 'dangerous' (worst case).
If however you still want to proceed in this direction you may be interested by this
blog entry:
http://weblogs.java.net/blog/emcmanus/archive/2006/11/a_real_example.html
It isn't exactly what you are asking for but it may help you on your way.
Hope this helps,
-- daniel
JMX, SNMP, Java, etc...
http://blogs.sun.com/jmxetc

How does jconsole know of all monitored JVMs in system?

When you run jconsole, the tab named "local" lists JVMs running and their PIDs. By what mechanism is it able to 'know' which JVMs are running that have been started with the arguments that enable JMX management?
Does jconsole connect to JVMs or to MBeanServers? (Assume each JVM has multiple MBeanServers, and each MBeanServer has multiple domains.)
Also, what's the difference between using the 'remote' and 'advanced' tabs to connect to a JVM? They both have usernames and passwords, but while the 'remote' tab has a host and port, the 'advanced' tab has a URL that contains a host and port within it. So what's the difference - when would you pick one method of connection over another?
Thanks.

If jconsole connects to MBeanServers rather than
JVMs, then how can it tell the difference between
multiple MBeanServers that have been started by a
single JVM?JConsole connects to a given JMX connector server which is associated with a given MBeanServer at creation time.
For example, if I have a simple application (i.e. one
JVM) that starts up two MBeanServers in its main
method, using
MBeanServerFactory.createMBeanServer(name). To start
the application, you run the JVM with the
com.sun.management.jmxremote and
com.sun.management.jmxremote.port variables.
How will jconsole know to differentiate between the
two MBeanServers? After all, there's only one JVM -
and it's been started with only one port number.In your example JConsole will not see any of your MBeanServers. It'll see the platform MBeanServer which is the one used by the out-of-the-box management agent.
The next question I have is regarding the JVM - does
any JVM that's started locally show up in the "local"
tab of JConsole (because the JVM is always
instrumented by default - true?), or does it only
appear if you run it with the
com.sun.management.jmxremote variable?The new Attach API in JDK 6 allows JConsole 6 to show all the JVMs running on the local machine although you will only be able to connect to the ones running on JDK 6 (and JDK 5.0 if started with the com.sun.management.jmxremote or com.sun.management.jmxremote.port system properties).
JConsole 5 only shows the JVMs running on JDK 5.0 and started with the com.sun.management.jmxremote or com.sun.management.jmxremote.port system properties.
Have a look at the link below for more detailed info:
http://java.sun.com/javase/6/docs/technotes/guides/management/index.html
Regards,
Luis-Miguel Alventosa
Java SE JMX/JConsole development team
Sun Microsystems, Inc.
http://blogs.sun.com/lmalventosa/

Monitoring JVM Heap

I would like to be able to see what happened to the JVM's heap following a
performance test.
I'm really only interested in amount of heap used (ideally for each area of
the heap - in 1.3 onwards). If I could get this figure regularly (say every
5 seconds) I would be able to plot and see from the graph whether I have too
little or too much heap.
Is verbosegc the best way to do this i.e. just get the figures either side
of a gc? Or is there a better way? I don't want a GUI tool as the runs can
take hours and I want to be able to sleep! Just something that outputs to a
file.
Thanks in advance for all advice
Ed

"Ed Barrett" <[email protected]> wrote:
I would like to be able to see what happened to the JVM's heap following
a
performance test.
I'm really only interested in amount of heap used (ideally for each area
of
the heap - in 1.3 onwards). If I could get this figure regularly (say
every
5 seconds) I would be able to plot and see from the graph whether I have
too
little or too much heap.
Is verbosegc the best way to do this i.e. just get the figures either
side
of a gc? Or is there a better way? I don't want a GUI tool as the runs
can
take hours and I want to be able to sleep! Just something that outputs
to a
file.
Thanks in advance for all advice
Ed
Verbosegc is a good option. Here is how you can do it. Set the heap size to one
of your lower settings. Turn on verbosegc. See how frequently you collect GC.
If you never do it then you do not use a high amount of memory. If the GC is too
frequent then your heap size is small.

How to monitor OACore JVM?

Hi All,
ebs r12.1.3
rdbms 11gR2
aix 6.1 64bits.
I would like to know if there's a way to monitor the OACore JVM usage? For example, what's running inside, how much memory free / used, memory used by each process inside, any leak, etc.
Is there a tool to do that?
Thank you!

Is this a duplicate post? -- OACore monitoring question
Nayas wrote:
Hi All,
ebs r12.1.3
rdbms 11gR2
aix 6.1 64bits.
I would like to know if there's a way to monitor the OACore JVM usage? For example, what's running inside, how much memory free / used, memory used by each process inside, any leak, etc.
Is there a tool to do that?
Thank you!11i: How To Use Jconsole to Monitor JVM with Oracle E-Business Suite 11i [ID 415455.1]
JSERV Java Processes Not Starting After Upgrade To JDK 1.6.0 on HP/UX [ID 1291679.1]
How to create a Java heapdump on e-Business Suite ? [ID 835909.1]
https://blogs.oracle.com/stevenChan/entry/using_jconsole_to_monitor_apps
Thanks,
Hussein

How to remove inactive session from monitor users in oracle apps 11i

Hi All,
when I am monitoring users from security- user - monitor in apps 11i, its showing many inactive users.
I dont know how to remove them
kindly help me.
thanks in advance
sagb

Hi hsawwan,
Thank you very much for the reply, it really worked fine.
thanx again
Sagb

Monitoring tool for JVM

Hi,
Our's is a multithreaded application. Recently in production our application is getting hang and stop running after running for sometime. Later we changed the VM arguments we pass at the time of startup and it is running fine. But the same application is running fine in SIT and UAT with the old VM confiuration. We are using JDK1.4 and running on Sun Solaris5.8. The old and new VM arguments are
OLD MEM_ARGS:
-Xms128m -Xmx256m -XX:PermSize=128m -XX:MaxPermSize=128m -Xss512k
NEW MEM_ARGS:
-XX:+PrintGCDetails -XX:+PrintHeapAtGC -Xms128m -Xmx512m -XX:PermSize=32m -XX:NewSize=32m -XX:MaxNewSize=128m -XX:MaxPermSize=128m -Xss512k
Can anyone suggest any VM monitoring tool to monitor the VM statitics and thread stack of my application/process. Can I use monitoring tools comes with JDK1.5 to monitor JVM of 1.4. If ye, how to use it. Please help me as it is very serious problem in Production.

Is it at all possible to use JDK 1.5? The monitoring tools/APIs both inside and outside the VM are far superior to those in 1.4. We upgraded to 1.5 immediately after it came out solely because of this.
You've made several changes all at once between your old and new vm arguments. Maybe you could try small sets of changes at a time to help narrow down which set is helping you (for example, try only adding the memory size change by itself). If an Error is thrown in your threads, what catches or logs it? Maybe it'll show up wherever stderr is logged.

Linux command/shell script to find Memory consumed by JVM in EBS,SOA

Hi All,
Could anyone please let me know the following:
a)Linux command/shell script to find Memory consumed by JVM for every 1 minute frequency interval in EBS R12, SOA suite
b)Percentage of the Heap memory usage by the JVM for every 1 minute frequency interval in EBS R12, SOA suite
Thanks for your time!
Regards,

user10088255 wrote:
Hi All,
Could anyone please let me know the following:
a)Linux command/shell script to find Memory consumed by JVM for every 1 minute frequency interval in EBS R12, SOA suite
b)Percentage of the Heap memory usage by the JVM for every 1 minute frequency interval in EBS R12, SOA suite
Thanks for your time!
Regards,Please see these docs.
JVM: Guidelines to setup the Java Virtual Machine in Apps Ebusiness Suite 11i and R12 [ID 362851.1]
Generate JVM heap dump in E-Business suite 11i and R12 [ID 462550.1]
11i: How To Use Jconsole to Monitor JVM with Oracle E-Business Suite 11i [ID 415455.1]
Configuring various JVM tuning parameters for Oracle E-Business suite 11i and R12 [ID 567551.1]
Script to find Apache, Java, Jinitiator, Forms version and JVM details for Oracle E-Business Suite 11i [ID 466890.1]
JVM Memory Monitoring, Tuning, Garbage Collection, Out of Memory, and Heap Dump Analysis For SOA Suite Integration 11g [ID 1358719.1]
How to Perform Memory and Thread Analysis on SOA [ID 1450293.1]
Thanks,
Hussein

IS INCREASING number of JVM = good performance on forms

Hi,
Will increasing number of JVMs make the oracle forms work faster. :). [Release is R12].
Regards
Taher

Taher,
Not necessarily -- See these documents for details.
Note: 362851.1 - Guidelines to setup the JVM in Apps Ebusiness Suite 11i and R12 (Customer Recommended)
Note: 567551.1 - Configuring various JVM tuning parameters for Oracle E-Business suite 11i and R12
Note: 415455.1 - How To Use Jconsole to Monitor JVM with Oracle E-Business Suite 11i10 and R12
Note: 763658.1 - R12: What Is the OAFM JVM Process Used For?
Regards,
Hussein

Easy to produce - Memory Leak in JVM Using thread

I was just debugging the problem with our server and got this error (not from the original code, I reproduced it with small code)
at java.lang.Thread.run(Unknown Source)
java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Unknown Source)
at SomeObject.resursiveThreadGeneratorMethod(ThreadRecursionLeak.java:12
at ClientThread.run(ThreadRecursionLeak.java:27)
it is just a simple program generating thread recursively with a lock on an object
import java.lang.Runnable;
import java.lang.Thread;
//     <<Objec/Monitor Class>>
     class SomeObject{
          public synchronized void resursiveThreadGeneratorMethod(int threadNumber, int k){
               if(k<=0)
                    return;
               else{
                    System.out.println("Thread: "+threadNumber + "call number: "+k);
                    Thread thread=new Thread(new ClientThread(this));
                    thread.start();
                    resursiveThreadGeneratorMethod(threadNumber,k-1);
//     <<Thread Class>>
     class ClientThread implements Runnable{
          SomeObject someObject=null;
          public static int threadNumber;
          public ClientThread(SomeObject someObject){
               this.someObject=someObject;
               threadNumber++;
          public void run(){
               someObject.resursiveThreadGeneratorMethod(this.threadNumber,10);
//     <<Driver Class>>
     public class ThreadRecursionLeak{
          public static void main(String [] args){
               SomeObject someObject=new SomeObject();
               Thread thread=new Thread(new ClientThread(someObject));
               thread.start();
is there any way I can monitor JVM memory status (programatically), kill those threads leading to memory leak and send notification to the system admin.
We run JVM 1.4 on the server and need to address this issue as we do not have control over the code that can be submitted to the server, we just do some checks and then let it run on the servers.
Our main requirement is to keep JVM alive and kill all those code and report them.
Message was edited by:
rajanikant_malviya

You can monitor the JVM with the
[url=http://java.sun.com/j2se/1.4.2/docs/guide/jvmpi/i
ndex.html]JVMPI if you're using the Sun JVM.This is native code that basically gets
notified anytime the JVM does something
interesting.
However, you're going to have a very difficult time
catching code that does what the code you show does.
I'm not sure I understand your environment - you
allow people to submit code and you run it? Are you
running it in the same JVM as your server? That
seems like a huge issue. A simple System.exit()
code will take down your server.
Let us know some more details.
We are actually having a portal through witch users can submit their code, witch are basically utility codes for different operations teams.
we then provide a way to schedule them.
At the background, we are having 6 (Win) servers where at each server we are having 20 to 25 users on different ports (managed by our application) running there own JVMs. When a schedule is met we just invoke a servlet (on any free port) and pass code id (stored in DB). And this servlet is responsible for compilation and exicution of the code (We just use Runtime to fork this new process).
I don't know, but is there any way through witch I can monitor this process and restrict to generate threads recursively???

Help in writing scripts for monitoring

Hi All,
I am in the position to write scripts for monitoring JVM and JDBC. I know the concept of confiuration MBean and run Time MBean.I planned to use WLShell scripting.In my organization using WLShell is not preferred by anyone. I
dont have any further idea about it. Any other possibilies are there to list the paramters of JVM and JDBC using any scripting.Please help me regrding this.
Jasmine

I solved that problem.Now i could enter into intractive mode.but couldnt connect to server using connect('weblogic','weblogic','t3://localhost:7001').The servers are up and running.
I am getting the following error.
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.io.StreamCorruptedException
at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:108)
at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:138)
at weblogic.management.internal.RemoteMBeanServerImpl_812_WLStub.getServerName(Unknown Source)
at weblogic.management.scripting.WLScriptContext.connect(WLScriptContext.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java)
at org.python.core.PyMethod.__call__(PyMethod.java)
at org.python.core.PyObject.__call__(PyObject.java)
at org.python.core.PyObject.invoke(PyObject.java)
at org.python.pycode._pyx4.connect$2(<iostream>:68)
at org.python.pycode._pyx4.call_function(<iostream>)
at org.python.core.PyTableCode.call(PyTableCode.java)
at org.python.core.PyTableCode.call(PyTableCode.java)
at org.python.core.PyTableCode.call(PyTableCode.java)
at org.python.core.PyFunction.__call__(PyFunction.java)
at org.python.pycode._pyx6.f$0(<input>:1)
at org.python.pycode._pyx6.call_function(<input>)
at org.python.core.PyTableCode.call(PyTableCode.java)
at org.python.core.PyCode.call(PyCode.java)
at org.python.core.Py.runCode(Py.java)
at org.python.core.Py.exec(Py.java)
at org.python.util.PythonInterpreter.exec(PythonInterpreter.java)
at org.python.util.InteractiveInterpreter.runcode(InteractiveInterpreter.java)
at org.python.util.InteractiveInterpreter.runsource(InteractiveInterpreter.java)
at org.python.util.InteractiveInterpreter.runsource(InteractiveInterpreter.java)
at weblogic.WLST.main(WLST.java:113)
Caused by: java.io.StreamCorruptedException
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1301)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
at weblogic.common.internal.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:119)
at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.java:112)
at weblogic.management.internal.RemoteMBeanServerImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:477)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:420)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:353)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:144)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:415)
at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:30)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
--------------- nested within: ------------------
weblogic.rmi.extensions.RemoteRuntimeException: Unexpected Exception - with nested exception:
<b>Please help me out.</b>
Jasmine

Monitoring JVM in 11i

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