Frank,
Thanks for the reply. I'm going to start tryiong to
debug Tomcat and see what this NullPointer is.
Let me know if you get anywhere and I'll do the same.
One thing I've read about and experienced was bad
performance with IBM's vm on Linux w/ Tomcat. You
might want to try Sun's vm and see if it gets any
better.
Regardless though, I still think something's buggy
in Tomcat.
bill
--- "Lucero, Frank J" <[EMAIL PROTECTED]>
wrote:
> Bill,
>
> I'm doing about the same thing. I'm running the
> following:
> apache 1.3.19
> Tomcat 3.2.1
> IBMJava2-SDK-1.3-5.0.i386.rpm
> classes12.zip (from Oracle)
>
> I am using LoadRunner with a 100 simulated users
> accessing 9 Oracle JSPs.
> I'm running
> this 100 times. It fails about 8 out of 10 times.
>
> What i have found is that even if you only run 10
> users, but run
> the scenario 1000 and it fails at about half way
> through.
>
> I've been running with both mod_jk in Apache and
> also native tomcat with the
> same results
> so I'm sure the problem is with tomcat. ...but not
> sure exactly where or
> what to do to fix
> it. If you find anything, please let me know.
> regards,
>
>
>
> -----Original Message-----
> From: Bill Graham [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, March 15, 2001 9:14 PM
> To: [EMAIL PROTECTED]
> Subject: Linux-Tomcat-ThreadPool
> NullpointerException
>
>
> 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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