Sunday, January 25, 2009

Multithreaded CMS crash

I ran across a CMS crash bug in Hotspot 10 b19 (OpenJDK6 b11), which is described here:

The symptom is that VM crashes in the concurrent GC thread at the following stack trace (with mangled symbols):


A workaround is to use the JVM option -XX:-CMSConcurrentMTEnabled to disable the multithreaded CMS collection. Upgrading to the JDK with newer Hotspot is a better idea, though.

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