Java support for jstack

[Ronald Klop]

On Tue, 13 Oct 2009 13:45:49 +0200, Victor Balada Diaz  
<v.balada at coolbleiben.net> wrote:

> Hello Ronald,
>
> I tried openjdk jstack against diablo-jdk and it doesn't work, so
> i just tried using tomcat with openjdk and when running jstack i
> get the following error:
>
> yac# /usr/local/openjdk6/bin/jstack -F -l 89291
> Attaching to process ID 89291, please wait...
> Debugger attached successfully.
> Server compiler detected.
> JVM version is 11.0-b17
> Deadlock Detection:
>
> No deadlocks found.
>
> Thread -1924730496: (state = BLOCKED)
> Error occurred during stack walking:
> sun.jvm.hotspot.debugger.DebuggerException:
> sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
> lwp
>         at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal
> $BsdDebuggerLocalWorkerThread.execute(BsdDebuggerLocal.java:152)
>         at
> sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.getThreadIntegerRegisterSet(BsdDebuggerLocal.java:455)
>         at
> sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:65)
>         at
> sun.jvm.hotspot.runtime.bsd_amd64.BsdAMD64JavaThreadPDAccess.getCurrentFrameGuess(BsdAMD64JavaThreadPDAccess.java:92)
>         at
> sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:252)
>         at
> sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:214)
>         at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
>         at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
>         at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
>         at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
>         at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:616)
>         at sun.tools.jstack.JStack.runJStackTool(JStack.java:136)
>         at sun.tools.jstack.JStack.main(JStack.java:102)
> Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
> failed for a lwp
>         at
> sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.getThreadIntegerRegisterSet0(Native  
> Method)
>         at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.access
> $800(BsdDebuggerLocal.java:51)
>         at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal
> $1GetThreadIntegerRegisterSetTask.doit(BsdDebuggerLocal.java:449)
>         at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal
> $BsdDebuggerLocalWorkerThread.run(BsdDebuggerLocal.java:127)
>
> Locked ownable synchronizers:
>     - None
>
> [... same error for all the other threads ...]
>
> Also if i try to use it without -F i get the following error:
>
> /usr/local/openjdk6/bin/jstack  89291
> 89291: Unable to open socket file: target process not responding or
> HotSpot VM not loaded
> The -F option can be used when the target process is not responding
>
> Do you have any ideas on what could be wrong?
>
> Thanks a lot.
> Regards.
>
> On Sat, 2009-10-03 at 16:11 +0200, Ronald Klop wrote:
>> Jstack works in openjdk6.
>> Also on a program running in another jdk if I remember it correct.
>>
>> Ronald.
>>
>> On Thu, 01 Oct 2009 14:42:02 +0200, Victor Balada Diaz
>> <v.balada at coolbleiben.net> wrote:
>>
>> > Hello,
>> >
>> > I'm trying to use jstack in a FreeBSD 7.1-RELEASE-p7 amd64 with
>> > diablo-jdk-1.6.0.07.02_3 but i always get the following error:
>> >
>> > $PID: no providers installed
>> >
>> > I saw a mail in 2007 asking about what would be needed to make it
>> > work, but no answers. Is there any work in progress to make jstack  
>> work?
>> > What's needed and how can i help?
>> >
>> > Thanks in advance.
>> > Regards.
>> >

Do you run jstack as the same user as the java process?

Ronald.