Tomcat hangs 2004-03-25 - By Jeff Tulley
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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) 3/25/04 5:50:42 PM >>>
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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