-XX：+ HeapDumpOnOutOfMemoryError创建多个堆转储

Question

"-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/tmp" This parameter will help to take heap dump automatically when server limit is reached.

http://www.oracle.com/technetwork/java/javase/clopts-139448.html#gbzrr

I can see detailed information on above link but, " OutOfMemoryError " message prints so many times in my server log times.

So, If the error msg occurs multiple times, will JVM take multiple heap dump ?

Regards, Peter

Answer 1

The oracle jvm creates a heap dump only on the first OOM when this flag is specified. However you can manually create multiple heapdumps if the jvm process is still alive and responsive. A little bit of googling:
-XX:+HeapDumpOnOutOfMemoryError not creating hprof file in OOM

Answer 2

It depends on the JVM. I think the Oracle JVM only dumps once.