JVM restarts automatically

Question

when cpu reaches 100% my jvm restarts automatically with following error message.why it happens ???

Error:

ERROR | wrapper | 2012/04/05 20:00:31 | Shutdown failed: Timed out waiting for signal from JVM.
ERROR | wrapper | 2012/04/05 20:00:31 | JVM did not exit on request, terminated
STATUS | wrapper | 2012/04/05 20:00:36 | Launching a JVM...
INFO | jvm 4 | 2012/04/05 20:00:38 | WrapperManager: Initializing...
INFO | jvm 4 | 2012/04/05 20:00:43 | Apr 5, 2012 8:00:43 PM org.apache.coyote.http11.Http11BaseProtocol init
    INFO | jvm 4 | 2012/04/05 20:00:43 | INFO: Initializing Coyote HTTP/1.1 on http-8181
    INFO | jvm 4 | 2012/04/05 20:00:43 | Apr 5, 2012 8:00:43 PM org.apache.catalina.startup.Catalina load
    INFO | jvm 4 | 2012/04/05 20:00:43 | INFO: Initialization processed in 2375 ms
    INFO | jvm 4 | 2012/04/05 20:00:43 | Apr 5, 2012 8:00:43 PM org.apache.catalina.core.StandardService start
    INFO | jvm 4 | 2012/04/05 20:00:43 | INFO: Starting service Catalina
    INFO | jvm 4 | 2012/04/05 20:00:43 | Apr 5, 2012 8:00:43 PM org.apache.catalina.core.StandardEngine start
    INFO | jvm 4 | 2012/04/05 20:00:43 | INFO: Starting Servlet Engine: Apache Tomcat/5.5.25
    INFO | jvm 4 | 2012/04/05 20:00:44 | Apr 5, 2012 8:00:44 PM org.apache.catalina.core.StandardHost start

Answer 1

This is not JVM that is restarting. It is the wrapper script that you are using is shutting down it and starts again. This is how it is configured. Looks your application does a lot of CPU usage. You may try to go through both heap dumps and GC logs to see if it's related to garbage collector.