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 >
