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Title
Tomcat hangs on startup -
Description
If you instrument a tomcat 6.0.x running JVM >= 1.6.0_u16 and -Dcom.sun.management.jmxremote.port is specified, tomcat hangs right after loading the agent properties.
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Cause
Foglight instrumentation has a conflict with Sun jmxremote option.The conflict exists with -Dcom.sun.management.jmxremote or -Dcom.sun.management.jmxremote.port and related options. The issue is a class loading problem with Sun management agent. It should be noted that the problem may exist in previous version of JDK also not just > 1.6.0_16. In previous versions of JDK, the agent starts up but with the wrong main class where as in newer JDK, the agent startup itself stalls making it more obvious.
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Resolution
The solution is to use the -Dquest.agent.mainclass option setting it to the main class of the appserver.
Unfortunately the -Dquest.agent.mainclass flag is broken for X-agents in JavaEE Cart 5.5.0/5.5.1. We have a patched the agent to get this to work. They would need to upgrade the cartridge on the FMS to 5.5.1. The patch is attached to the solutionSteps to implement the patch:
1. Upgrade JavaEE cartridge to 5.5.1 on the FMS.2. Modify config file on FMS to add the new build number of the patch
a. FMS Console: Administration > Agents >Agent Properties > JavaEE > Advanced > nexus_compatible-builds.config and add the new build number "551-20100305-1531".
So this list would look something like:
CompatibleBuilds = (
"5245-20081209-1553",
"550-20090715-1132",
"551-20100305-1531",
);
b. Save the config file.
3. On the monitored hosts, back up performasure-agent.jar file at JavaEE_Agent_Home/lib directory outside the JavaEE_Agent_Home install directory.
4. Copy the patched jar file from FTP location to JavaEE_Agent_Home/lib directory and rename it to performasure-agent.jar.
5. Ensure that the tomcat start up scripts do have the -Dquest.agent.mainclass option set.
In this case: -Dquest.agent.mainclass=org.apache.catalina.startup.Bootstrap
6. Restart Tomcat and verify both agent and the tomcat jvm starts up.
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Defect ID
JEE-5374 -
Attachments
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Additional Information
refer case: 798863