We're running Tomcat 5.0.28 with JDK 1.4.2_8 hosting a single commercial web
application on our web server which uses MySQL 4.0.26 running on another
server. Both servers are Windows 2003 Enterprise, 2x3.0GHz XEON, 4GB RAM. Our
Tomcat instance is dedicated to the commercial web app, and the MySQL instance
is hosting only that app's database.
The web application is hanging every few days, and neither we nor the vendor
can figure out why. Restarting Tomcat is the only way to fix it. We've tried
all of the current stable versions of both MySQL and Tomcat, as well as JDK 5
(with Tomcat 5.5.x). The problem happens under each of them.
I'm highly confident the problem is with the commercial web app; we have other
web applications running under other Tomcat instances on the same server going
against a variety of MySQL and MSSQL databases on our database server, and none
of them have any problems.
If I generate a dump of the JVM using Ctrl-Break while running Tomcat as a
console app, what's the best resource for interpreting this? I suspect the
problem is a thread deadlock, or something similar.
Any other suggestions are appreciated.
Thanks!
David Boyer
