JDK7 SIGSEGV with G1 garbage collector

Bengt Rutisson bengt.rutisson at oracle.com
Tue Aug 20 23:52:01 PDT 2013

Hi Punya,

Thank you for the excellent bug report!

I cloned the test case and can reproduce the issue both with 7u25 build 
15 (that you used) and also with the latest build of JDK8.

I'll dig some more into what is going on and file a bug. Will ping this 
thread when I have more information.


On 8/21/13 12:05 AM, Punya Biswal wrote:
> [Apologies if this message is delivered twice; I sent it once before I
> realized this was a members-only list.]
> We're running into a JVM segfault when using a third-party library
> (Elasticsearch) alongside the G1 garbage collector. This issue has been
> reported elsewhere (for example,
> https://jira.terracotta.org/jira/browse/CDV-1651) and might already be on
> the OpenJDK roadmap. It's usually associated with the use of GNU Trove.
> We've been able to reduce the amount of code required to reproduce the
> crash to a short program that reliably crashes on my computer
> (a MacBook Pro) using only JDK core classes. I've also included the
> hs_err_* diagnostic file; both are at
> https://gist.github.com/punya/6287943 .
> Does this reduced repro help understand what's going on?
> A few points of interest:
> * running with -XX:+UseG1GC -Dcount=100000 always crashes
> * running with -XX:+UseG1GC -Xint -Dcount=100000 never crashes
> * running with -Xint -Dcount=100000 never crashes
> Using -ea and/or -server don't any effect these results. With regard to
> JVM versions,
> * it never crashes on JDK 6u51
> * it crashes on JDK 7u25 and JDK 7u43 (prerelease)
> * it never crashes on JDK 8 (prerelease)
> I'm happy to provide a link to a core dump if that helps.
> --
> Punya Biswal
> Palantir | Engineer
> pbiswal at palantir.com | 206 605 2397

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