Hi Jürgen, Thanks for the info.
Honestly, I don't know whether it's due to memory outage. But something is happening during the shutdown process. As you can see in the JAVA_OPTS setting, I have set the max heap size to 1G which is 50% of the total ph ysical memory and, if I'm not mistaken, I think we are running only one application in the tomcat so I don't think it's memory related but still not sure. The weird thing is instead that only the tomcat is supposed to crash, the whole server does. If I set the AgressiveHeap option is there still a possibility to eat up all the availble memory even if I set the max heap size? Best regards, Adrian Jürgen Link <juergen.l...@googlemail.com> 11/18/2011 02:59 PM Please respond to "Tomcat Users List" <users@tomcat.apache.org> To "Tomcat Users List" <users@tomcat.apache.org> cc Subject Re: Tomcat Causes Server to go Panic/Crash Hi Adrian, you might want to replace the AggressiceHeap option by a decent initial heap size, e.g. Xms=64m. AggressiveHeap seems to eat up all available memory: [...] The size of the initial heap is calculated based on the size of the physical memory and attempts to make maximal use of the physical memory for the heap (i.e., the algorithms attempt to use heaps nearly as large as the total physical memory). (see http://java.sun.com/docs/hotspot/gc1.4.2/#4.2.2.%20AggressiveHeap%7Coutline ) Did you investigate the cause of server panic (e.g. crash dump)? Is it memory related? Cheers Jürgen 2011/11/18 Adrian Zara <adrian.z...@aonhewitt.com> > Hi Chuck, > > Thanks for the prompt reply. Please refer to the following requested info: > > Tomcat version: Tomcat: 5.5.31 > JVM version: gij (GNU libgcj) version 3.4.2 20041017 (Red Hat 3.4.2-6.fc3) > > If the JAVA_OPTS affects the shutdown process, then I have to find out > what is the best setting for this env variable since I often encounter the > server panic during shutdown. What do you think? Both env variables ( > JAVA_OPTS and CATALINA_OPTS) are used throughout the catalina.sh file so I > cannot remove one and retain the other. Previously, JAVA_OPTS is set to > '-Xmx512m -XX:+AggressiveHeap' so I thought increasing the heap size to > 1024 will resolve the server panic. I have two tomcat seated on two > different machines. When I increased the JVM heap size on the first > machine and tried to restart a couple of times, I didn't encounter any > server panic. But when I tried on the other machine, even on the first > attempt, the server goes to panic. The two machines has the same specs. > Both tomcats contain the same web application. > > Do you think it is really the tomcat settings that causes the server to > panic? Should I consider using -server mode in the JAVA_OPTS? > > Best regards, > Adrian > > > > > "Caldarale, Charles R" <chuck.caldar...@unisys.com> > > 11/18/2011 01:46 PM > Please respond to > "Tomcat Users List" <users@tomcat.apache.org> > > > > To > "Tomcat Users List" <users@tomcat.apache.org> > cc > > Subject > RE: Tomcat Causes Server to go Panic/Crash > > > > > > > > From: Adrian Zara [mailto:adrian.z...@aonhewitt.com] > > Subject: Tomcat Causes Server to go Panic/Crash > > > Tomcat Version: 5.5.x > > Exact Tomcat version? There have been at least 15 releases of 5.5. > > > JAVA_OPTS='-Xmx1024m -XX:+AggressiveHeap' > > Note that setting JAVA_OPTS affects all Tomcat Java executions, including > the shutdown process. You should be using CATALINA_OPTS, not JAVA_OPTS. > > > settings in the catalina.sh > > You should be creating a setenv.sh script to hold environment variable > settings, not modifying catalina.sh. > > > Server info: Redhat 3.9.2-6.fc3 > > CPU: 3.4 GHz > > Memory: 2GB > > Exact JVM version? > > - Chuck > > > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY > MATERIAL and is thus for use only by the intended recipient. If you > received this in error, please contact the sender and delete the e-mail > and its attachments from all computers. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > > > > > The information contained in this e-mail and any accompanying documents > may contain information that is confidential or otherwise protected from > disclosure. 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