Hi Ibrahim, This is most likely due to a ulimit setting. Check with *ulimit -a* and set *ulimit -n unlimited* and *ulimit -l unlimited*.
I've experienced the same problem in the past and this was the reason. Hope this helps On Wed, Jan 20, 2016 at 9:49 AM, Ibrahim Ikhlawi <ibrahim_...@hotmail.com> wrote: > > > Hi Howard, > > I use 64bit JVM. The problem is not in the code, because I am still > getting the same error when I run the Hello.java from examples folder. > Any other suggestion? > > Ibrahim > > ------------------------------ > Date: Tue, 19 Jan 2016 09:48:24 -0700 > From: hpprit...@gmail.com > To: us...@open-mpi.org > Subject: Re: [OMPI users] How to allocate more memory to java OpenMPI > > > HI Ibrahim, > > Are you using a 32bit or 64bit JVM? > > I don't think this is an Open MPI issue, but likely something owing to > your app or your java setup. > You may want to checkout > > > http://javaeesupportpatterns.blogspot.com/2012/09/outofmemoryerror-unable-to-create-new.html > > If you'd like to post the java code to the list, I can try it out on some > of the servers I use. > > Howard > > > 2016-01-19 8:03 GMT-07:00 Ibrahim Ikhlawi <ibrahim_...@hotmail.com>: > > > Hallo, > > I'm working with java OpenMPI on a server with 64GB memory. But when I > run the java class I can only run it on until 15 processes (with this > command: mpirun -np 15 java Multiplikation). Although there is 64GB memory, > only about 3 GB will be used(with top command can I see that, the first two > lines are below). When I run more than 15 processes I get this error: > > Error occurred during initialization of VM > java.lang.OutOfMemoryError: unable to create new native thread > > > But I want to run it on more than 15 processes and use more than 3 GB. In > Addition, after searching in google I have tried to run it with this > command: > > mpirun -np 20 java -Xmx2096M -Xms1048M Multiplikation > > but I still get the same error. > > My question: How can I allocate java more memory, so that I run my program > with more than 15 processes and more than 3GB memory? > > thanks in advance > Ibrahim > > PS: > It may help, these are the first two lines from the top command: > > PID PRI VIRT RES SHR S CPU% MEM% > 23255 20 0 20.7G 103M 11916 S 2.0 0.2 0:52.14 java > 23559 20 0 20.7G 33772 11916 S 1.0 0.1 0:50.82 java > > > > > > > > > > > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/01/28301.php > > > > _______________________________________________ users mailing list > us...@open-mpi.org Subscription: > http://www.open-mpi.org/mailman/listinfo.cgi/users Link to this post: > http://www.open-mpi.org/community/lists/users/2016/01/28302.php > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/01/28308.php > -- Saliya Ekanayake Ph.D. Candidate | Research Assistant School of Informatics and Computing | Digital Science Center Indiana University, Bloomington Cell 812-391-4914 http://saliya.org
