Hello All: I know there will be some one who can help me in solving this problem.
- I can compile my helloworld.c program using mpicc and I have confirmed that the script runs correctly on another working cluster, so the local paths are set up correctly I think and the script definitely works. - If I execute mpirun from my master node, and using only the master node, helloworld executes correctly: mpirun -n 1 -host master --mca btl sm,openib,self ./helloworldmpi hello world from process 0 of 1 - If I execute mpirun from my master node, using only the worker node, helloworld executes correctly: mpirun -n 1 -host node001 --mca btl sm,openib,self./helloworldmpi hello world from process 0 of 1 Now, my problem is that if I try to run helloworld on both nodes, I get an error: mpirun -n 2 -host master,node001 --mca btl openib,self ./helloworldmpi -------------------------------------------------------------------------- At least one pair of MPI processes are unable to reach each other for MPI communications. This means that no Open MPI device has indicated that it can be used to communicate between these processes. This is an error; Open MPI requires that all MPI processes be able to reach each other. This error can sometimes be the result of forgetting to specify the "self" BTL. Process 1 ([[5228,1],0]) is on host: hsaeed Process 2 ([[5228,1],1]) is on host: node001 BTLs attempted: self Your MPI job is now going to abort; sorry. -------------------------------------------------------------------------- -------------------------------------------------------------------------- It looks like MPI_INIT failed for some reason; your parallel process is likely to abort. There are many reasons that a parallel process can fail during MPI_INIT; some of which are due to configuration or environment problems. This failure appears to be an internal failure; here's some additional information (which may only be relevant to an Open MPI developer): PML add procs failed --> Returned "Unreachable" (-12) instead of "Success" (0) -------------------------------------------------------------------------- *** The MPI_Init() function was called before MPI_INIT was invoked. *** This is disallowed by the MPI standard. *** Your MPI job will now abort. Abort before MPI_INIT completed successfully; not able to guarantee that all other processes were killed! -------------------------------------------------------------------------- mpirun has exited due to process rank 0 with PID 7037 on node xxxx exiting without calling "finalize". This may have caused other processes in the application to be terminated by signals sent by mpirun (as reported here). -------------------------------------------------------------------------- *** The MPI_Init() function was called before MPI_INIT was invoked. *** This is disallowed by the MPI standard. *** Your MPI job will now abort. Abort before MPI_INIT completed successfully; not able to guarantee that all other processes were killed! 1 more process has sent help message help-mca-bml-r2.txt / unreachable proc Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages 1 more process has sent help message help-mpi-runtime i tried using mpirun -n 2 -host master,node001 --mca btl tcp,sm,self ./helloworldmpi mpirun -n 2 -host master,node001 --mca btl o penib,tcp, self ./helloworldmpi etc.. But no flag is works. Can some one reply with the idea. Thanks in Advance. Regards-- -- _______________________________________________ Hamid Saeed _______________________________________________
