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From Konstantin Kolinko <knst.koli...@gmail.com>
Subject Re: Tomcat 5.5.27 - Solaris 10 - Tomcat process starts additional copies of itself with only 1 thread and no CPU
Date Fri, 09 Sep 2011 11:02:05 GMT
2011/9/9 Dave Stubbs <dave@stubbs.uk.com>:
> We are seeing tomcat starting up additional copies of itself, each new copy
> is allocating a chunk of storage, it only starts 1 thread, nothing gets
> written to any logs and no CPU is being listed as having been used.
>(...)

1. It might be an issue with "ps" utility that it shows threads as
separate processes:

In it already mentioned in the FAQ:

http://wiki.apache.org/tomcat/FAQ/Linux_Unix#Q1

In Tomcat 6 and later you can configure an <Executor> so that unneeded
request processing threads can be stopped.

Without an <Executor> the threads will be created if concurrent load
on your Tomcat increases, so active thread count will increase until
it reaches the default count of 200 request processing threads on
<Connector>.

2. Are you starting any additional processes by yourself? (E.g. when
using CGIServlet).


> tomcat 21115 21114 0 14:46:44 ? 193:04 /usr/java/bin/java
> -Djava.util.logging.config.file=/opt/apache-tomcat -5.5.27-ti
> tomcat 773 21115 0 17:29:27 ? 0:00 /usr/java/bin/java
> -Djava.util.logging.config.file=/opt/apache-tomcat -5.5.27-ti

Best regards,
Konstantin Kolinko

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