When tomcat 'locks up', it won't answer any requests to any webapp, including the manager webapp, even on port 8080. Apache still runs fine on requests for things that are not directed to tomcat.
We are having mixed results right now fixing this. We have two separate servers running different versions of tomcat and apache but used to be running the same JVM from IBM that were having problems. We upgraded the java version on machine #1 to the latest IBM version to see if it would continue having problems. We have restarted that server a couple of times in the last week, but not because it locked up... so our results on that server are inconclusive since it hasn't been given the chance to run straight for a while.
That server runs apache 1.3.27 and tomcat 4.1.27 and the java version is:
java version "1.4.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1)
Classic VM (build 1.4.1, J2RE 1.4.1 IBM build cxia321411-20040301 (JIT enabled: jitc))
It used to be what our other machine (#2) is using:
java version "1.4.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1)
Classic VM (build 1.4.1, J2RE 1.4.1 IBM build cxia321411-20030930 (JIT enabled: jitc))
Machine #2 runs tomcat 4.1.30, apache 2.0.40 and mod_jk2.0.2. It used to lock up daily or once every two days (it has a higher load). We have put a cron in place to restart tomcat nightly. So we assume that it would still be having problems if it wasn't for that.
We are not using jboss or JMX.
If I can get server #1 to run consistently for an extended period of time, I'll try that java on machine #2 and turn off the nightly restarts and see if that works as well. There were quite a few fixes in the IBM changelog that talked about lockups that had to do with jitc.
Let me know how you are doing with this issue as well.
Daniel
Rupprecht, Alexander wrote:
Hi Daniel,
unfortunately we've got exactly the same problem. Do You have any further informations concerning Your problem or any solutions? We've tested a lot, analyzed everything (including tcp-connectivity), but jboss cannot answer all request while there is heavy load on our servers.
With kind regards
Alex
------------------------------------------------------------------------------------------ Alexander Rupprecht
PlanetHome AG M�nchnerstra�e 14 85774 Unterf�hring http://www.planethome.de
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