Tomcat 4.1.29 CoyoteAdapter Exception

[Randall Svancara <rs...@adaweb.net>]

Hi,

I am running tomcat 4.1.29, apache 2.0.48, with mod_jk configured on Windows XP.  Occasionally, I will receive the following error:

2004-02-23 15:40:07 CoyoteAdapter  Requested cookie session id is A02AD09BF242D0D916799B2EBB0FCC92.worker1
2004-02-23 15:40:07 CoyoteAdapter An exception or error occurred in the container during the request processing
java.lang.NullPointerException
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:164)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:309)
	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:387)
	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:673)
	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:615)
	at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:786)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
	at java.lang.Thread.run(Thread.java:534)

At which point the web service becomes UNAVAILABLE on port 80 through apache which forwards the requests via mod_jk to
the tomcat 4.1.29 servlet engine.  I am including some snippets from my server.xml below for the coyote connector.  

              <Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
               port="8019" minProcessors="100" maxProcessors="600"
               enableLookups="false" redirectPort="8443"
               acceptCount="10" debug="10" connectionTimeout="60000"
               useURIValidationHack="false"
               protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/>


I have also configured apache with 600 max threads, see snippet below.  

# WinNT MPM
# ThreadsPerChild: constant number of worker threads in the server process
# MaxRequestsPerChild: maximum  number of requests a server process serves
<IfModule mpm_winnt.c>
ThreadsPerChild 600
MaxRequestsPerChild  0
</IfModule>

If someone has any idea what I have misconfigured or if you need more information, let me know.  
I am desperate at this point to find the root of this problem that has been plaguing our website since its
release January.

Thank you,

Randall Svancara

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