Hi > > I used your test code to confirm it also fails on our trunk - > > it looks like someone got the reference count wrong when > > creating/destructing groups. > > No, the code is not MPI compliant. > > The culprit is line 254 in the test code where Siegmar manually > copied the group_comm_world into group_worker. This is correct > as long as you remember that group_worker is not directly an > MPI generated group, and as a result you are not allowed to free it. > > Now if you replace the: > > group_worker = group_comm_world > > by an MPI operation that create a copy of the original group such as > > MPI_Comm_group (MPI_COMM_WORLD, &group_worker); > > your code become MPI valid, and works without any issue in Open MPI. > > George.
Thank you very much for your solution. Now my Java program in openmpi-1.9 works as well, if I replace this line. Kind regards Siegmar
