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From Konstantin Kolinko <knst.koli...@gmail.com>
Subject Re: Tomcat hung
Date Fri, 19 Nov 2010 01:03:54 GMT
2010/11/18 Robillard, Greg L <greg.l.robillard@lmco.com>:
> I continually get tomcat in this state and can only recover by restarting tomcat from
the command line.  Here is the stack trace that I gathered while getting into this state,
but it does not make any sense to me.
>
> Tomcat version apache-tomcat-6.0.26
>
> OS linux
>
> Jstack trace on tomcat hang.
> Tomcat is not responding, nor any webapps.  Profiler will not attach
>
> Attaching to process ID 21989, please wait...
> Debugger attached successfully.
> Server compiler detected.
> JVM version is 10.0-b19
> Deadlock Detection:
>
> No deadlocks found.
>
> Thread 3343: (state = BLOCKED)
> - org.netbeans.lib.profiler.server.ProfilerRuntimeMemory.getAndSendCurrentStackTrace(char,
char, int, long) @bci=0, line=218 (Compiled frame)
> - org.netbeans.lib.profiler.server.ProfilerRuntimeObjLiveness.traceObjAlloc(java.lang.Object,
char) @bci=158, line=278 (Compiled frame)
> - java.lang.String.valueOf(char[]) @bci=12, line=2841 (Interpreted frame)
> - java.lang.Thread.getName() @bci=4, line=1061 (Interpreted frame)
> - org.apache.catalina.connector.CoyoteAdapter.service(org.apache.coyote.Request, org.apache.coyote.Response)
@bci=120, line=295 (Interpreted frame)
> - org.apache.coyote.http11.Http11Processor.process(java.net.Socket) @bci=468, line=852
(Interpreted frame)
> - org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(java.net.Socket)
@bci=82, line=588 (Interpreted frame)
> - org.apache.tomcat.util.net.JIoEndpoint$Worker.run() @bci=41, line=489 (Interpreted
frame)
> - java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)
>

The above, and Thread 12244:
It looks that String.valueOf() call in Thread 3343 (called by
Thread.getName()) results in performing some network IO and being
stuck there?

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