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
