I'd say the activity is moderate. Some 6-10 users would be using our
web application during that time. The machine is better than a
development machine but not as good as production one.

Jeff, can you explain more about the -- JVM's "permanent generation".

Thanks.

- SPS

----- Original Message -----
From: "Jeff Tulley" <jtulley@(protected)>
Date: Thursday, March 25, 2004 7:59 pm
Subject: Re: Tomcat Hangs

> What kind of activity is going on with this server during those two
> hours? Heavy, moderate, light load? Is it a development box or
> production?
>
> I ask the last question, since some have seen a problelm with repeated
> redeploys of a web application, where the JVM's "permanent generation"
> memory is running out even though the rest of the memory pools are
> nowhere near full.
>
> Jeff Tulley (jtulley@(protected))
> (801)861-5322
> Novell, Inc., The Leading Provider of Net Business Solutions
> http://www.novell.com
>
> >>> surya.suravarapu@(protected) >>>
> We have Tomcat 4.1.27 running in conjunction with Apache 1.3.x.
> We're
> using AJP13 connector. The machine that we're using has got over
> 2GB of
>
> Memory and good processor speed. Tomcat has been allocated 1 GB of max
>
> memory.
>
> The issue is: For every two hours or so Tomcat hangs. That means,
> Tomcat don't crash but simply don't accept any more connections. While
>
> using Tomcat with Apache we're getting "500 Internal Server
> Error". We
>
> are constantly restarting server to make it work. There is no good
> information in the logs that could lead us to debug this issue.
>
> I have tried several things. Taken out Apache and Connectors from
> the
> equation by running Tomcat as standalone. This time Tomcat we
> get "server not found error - Page cannot be displayed" message. I
> have
> also increased the maxProcessors of the connector to 300 instead
> of the
>
> default 75.
>
> Interesting thing is -- when Tomcat hangs the memory usage never
> reaches even half of the max memory (1 GB) allocated to Tomcat,
> and the
>
> number of threads that we see is also always less than half of
> maxProcessors value (300) set.
>
> If anybody encountered this kind of issue or if you have any
> thoughts
> please respond.
>
> Thanks in advance!
>
> - SPS
>
>
>
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