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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: Tomcat 5.0 which gets stuck
Date Fri, 10 Sep 2010 18:46:42 GMT
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Chuck,

On 9/8/2010 2:10 PM, Caldarale, Charles R wrote:
>> From: Sumeet Chitte [mailto:chittesumeet@gmail.com] 
>> Subject: Re: Tomcat 5.0 which gets stuck
> 
>> This server uses a third party tool, which uses Apache Tomcat 5.0.
> 
> Please be aware that Tomcat 5.0 is deprecated.  You are much more
> likely to get help if you are running on a current level.

For that matter, so is Microsoft Windows 2000.

>> What happens is that this Tomcat service gets stuck sometimes and the
>> Powerbuilder application gets frozens because of this.
> 
> Take a thread dump and see what's going on.
> 
> http://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F

Definitely.

Sumeet, note that your exception stack trace almost certainly has
nothing to do with their Tomcat instance appearing to freeze: something
else is happening to your server.

My wild guess with virtually no information is that you have a servlet
that leaks database connections when an error such as the above occurs,
and your server is waiting forever for a database connection from a pool.

Please post your conf/server.xml file (taking care to remove any
sensitive information such as usernames and passwords) and other
relevant files along with your thread dump so we can take a look.

Any chance of upgrading to a supported version of Tomcat? Tomcat 5.5 is
nearly a drop-in replacement for Tomcat 5.0, and Tomcat 6.0 isn't much
worse as an upgrade target.

- -chris
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