Patrick Plaatje wrote: > Hi all, > > on one of our websites we have a problem with threads keep hanging in > Tomcat. We first noticed this 1.5 week ago and tried several things to > find a solution. At that moment we were using java 1.4 and Tomcat 5.0. > The symptoms were there after three hours of operation, about 250 > threads were hanging within tomcat, and they seemed to be waiting for > "something". > > After a week we realised we needed more information whihc we couldn't > get from the current setup, we upgraded the three production application > servers to be Java 1.5 and Tomcat 5.5.25. All three servers still have > the same problem, although the problem now has an interval of appr. 6 > hours instead of three. > > During the hanging of the threads we made 8 threaddumps. But i am unsure > of how to "read" the thread dumps. A small overview of the state of the > threads: > > - 309 threads overall > - Threads waiting for monitors: 57 > - Threads sleeping on monitors: 191 > - Threads locking monitors: 225 > - Monitors: 225 > - Monitors without locking threads: 3 > > Can somebody please help me figuring out what the cause is, or how to > find the cause of the problem?
You'll need to provide the thread dumps. Rather than all 8, just two ~15s apart should suffice. Mark > > Best regards, > > Patrick > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
