Howard -- Does Nathan's recent infrastructure activity in Opal destructors help with this?
> On Apr 6, 2015, at 7:08 PM, Ralph Castain <r...@open-mpi.org> wrote: > > I think either solution would be valuable - this is something that came up a > few months ago, but the Java team members couldn’t trace it down, and neither > Jeff nor I had time to pursue it. > > >> On Apr 6, 2015, at 3:30 PM, Howard Pritchard <hpprit...@gmail.com> wrote: >> >> Hi Folks, >> >> There seems to have been recent outburst of interest in the mpi java >> bindings, so moving in retrograde fashion back to what I use to be doing, >> I've started investigating the Ompi JNI code. >> >> I'm noticing that at least on sles11sp3, that soon after the java vm invokes >> the JNI_OnUnload of the ompi JNI code, the JVM segfaults when running some >> pthread key destructors, namely those associated with pthread keys that ompi >> is setting up. If I set the destructor field to null in the ompi calls to >> pthread_key_create, then the jvm shuts down without a segfault after the >> java app exits. >> >> Note that one can get lucky, as is the case when I run the java app on my >> mac. That's because the jvm on this system doesn't care to run the >> JNI_OnUnload code. >> >> One way to handle this problem would be to go find all the places >> (fortunately not many) where opal_tsd_key_create is called, and then make >> sure there is an appropriate opal_tsd_key_destroy for the key during the >> MPI_Finalize procedure. Alternately, since this is basically a dso >> problem, one could define fini functions to run the destructors during the >> dlclose procedure. >> >> Any thoughts? >> >> Howard >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel >> Link to this post: >> http://www.open-mpi.org/community/lists/devel/2015/04/17185.php > > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2015/04/17186.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
