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From "Himanshu Thube" <thube.himan...@gmail.com>
Subject Tomcat 3.3.1a Hangs
Date Fri, 13 Oct 2006 12:03:11 GMT
Hello All,

We have a problem in our production system. Following is our environment.

Tomcat 3.3.1a
AIX 5.3
IBM JDK 1.3.1
Apache/1.3.28


The only change that we did was changed from AIX 5.1 ML 4 to AIX 5.3 ML5

Tomcat hangs sometimes 5 times a day or sometimes it works fine for a day or
two. We have tried to keep most of the parameters same. Tried to put all
logs on debug, but no errors anywhere. While starting Tomcat we also
redirected the errors and standard output to a log but no errors there as
well. We tried to check for any user behaviour or specific request that
might be causing this but nothing was found.

Only exceptions that we get are :

IOException in R

java.io.IOException: There is no process to read data written to a pipe.
 at java.net.SocketOutputStream.socketWrite(Native Method)
 at java.net.SocketOutputStream.write(SocketOutputStream.java(Compiled
Code))
 at org.apache.tomcat.modules.server.HttpResponse.doWrite(
Http10Interceptor.java(Compiled Code))
 at org.apache.tomcat.modules.server.HttpResponse.doWrite(
Http10Interceptor.java(Compiled Code))
 at org.apache.tomcat.core.OutputBuffer.realWriteBytes(OutputBuffer.java(Compiled
Code))
 at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java(Compiled
Code))
 at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java(Compiled
Code))
 at org.apache.tomcat.util.buf.IntermediateOutputStream.write(
C2BConverter.java(Compiled Code))
 at java.io.OutputStreamWriter.write(OutputStreamWriter.java(Compiled Code))
 at org.apache.tomcat.util.buf.CharChunk.append(CharChunk.java(Compiled
Code))
 at org.apache.tomcat.util.buf.CharChunk.append(CharChunk.java(Compiled
Code))
 at org.apache.tomcat.util.buf.CharChunk.append(CharChunk.java(Compiled
Code))
 at org.apache.tomcat.util.buf.CharChunk.append(CharChunk.java(Compiled
Code))
 at org.apache.tomcat.util.buf.CharChunk.append(CharChunk.java(Compiled
Code))
 at org.apache.tomcat.core.OutputBuffer.write(OutputBuffer.java:274)
 at org.apache.tomcat.modules.generators.ExceptionHandler.doService(
ErrorHandler.java:658)
 at org.apache.tomcat.core.Handler.service(Handler.java(Compiled Code))
 at org.apache.tomcat.core.Handler.service(Handler.java(Compiled Code))
 at org.apache.tomcat.modules.generators.ErrorHandler.handleErrorImpl(
ErrorHandler.java:414)
 at org.apache.tomcat.modules.generators.ErrorHandler.handleError(
ErrorHandler.java:184)
 at org.apache.tomcat.core.ContextManager.handleError(ContextManager.java(Compiled
Code))
 at org.apache.tomcat.core.ContextManager.service(ContextManager.java(Compiled
Code))
 at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(
Http10Interceptor.java:176)
 at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java(Compiled
Code))
 at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(
ThreadPool.java:516)
 at java.lang.Thread.run(Thread.java:512)



However this exception does not cause Tomcat to hang because the time when
exception is thrown and Tomcat hangs has never matched even with a
difference of hour.

Can someone please help ? Changing anything in the environment would be very
very difficult. Can someone atleast tell how we can atleast get what is the
error that is ausing this in Tomcat ?

-- 
Himanshu

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