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does java 6 generate thread dump in addition to heap dump (java_pid14941.hprof)
this is what happened to one of my applications.
java.lang.OutOfMemoryError: GC overhead limit exceeded Dumping heap to java_pid14941.hprof ...
I did find ava_pid14941.hprof in working directory, but didn't find any file which contains thread dump. I need to know what all the threads were doing when I got this OutOfMemory error.
Is there any configuration option which will generate thread dump in addition to heap dump on out of memory exception?
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The parameter -XX:+HeapDumpOnOutOfMemoryError can be set to enable heap dump when the JVM runs out of memory. You have set this parameter in the BW_JAVA_OPTS environment variable. By default the heapdump snapshot gets stored in the root location with the name java_pid1.
1) An easy way to solve OutOfMemoryError in java is to increase the maximum heap size by using JVM options "-Xmx512M", this will immediately solve your OutOfMemoryError.
Start the administrative console. In the navigation pane, click Troubleshooting > Java dumps and cores. Select the server_name for which you want to generate the heap dump. Click Heap dump to generate the heap dump for your specified server.
If you're in a Linux/Unix environment you can do this:
-XX:OnOutOfMemoryError="kill -3 %p"
This way you don't have to have your application generate periodic thread dumps and you'll get a snapshot when it actually chokes.
With %p, you don't need to pass the PID, JVM will automatically pick the correct process id as mentioned here.
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