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From William Au <bi...@cnet.com>
Subject Re: Linux-Tomcat-ThreadPool NullpointerException
Date Sun, 18 Mar 2001 19:59:53 GMT
I saw exactly the same thing when I ran a load test on
tomcat 3.2.1 wth jdk 1.2.2_07.  What's your Tomcat
max_thread set to?  I changed it to 10 and the problem
went away.  But I am not happy with the performance
with only 10 threads.

Bill

Bill Graham wrote:

> I'm just getting started with Tomcat and the first
> thing I'm doing
> is some load testing. I'm using VA Linux with Tomcat
> 3.2.1 and the Sun
> j2re1.3 VM. When hitting Tomcat with 60 threads each
> making 1000 requests,
> I periodically will get the following excepion on my
> client machines:
>
>         java.net.SocketException: Connection reset by peer:
> Connection reset by peer
>
> and following excepion on hy server machine:
>
>         2001-03-16 03:20:24 - ContextManager: Error reading
> request, ignored -      java.lang.NullPointerException
>         at
> org.apache.tomcat.service.http.HttpConnectionHandler.processConnection
>         (HttpConnectionHandler.java:191)
>         at
> org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
>         at
> org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
>         at java.lang.Thread.run(Thread.java:484)
>
> Of the 20k requests made, I'll get about 60 errors on
> the first run, which might be
> exceptable but on subsequest runs They's incread up to
> about 150. By the third or
> fourth run, some or all of my client machines will
> hang while waiting for responses.
> This is not acceptable. I'm about to start diggin into
> the tomcat source but would
> love it if someone has solved (or knows how to soleve)
> this problem already.
>
> anyone?
>
> - bill
>
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