Hi, Yes, in order to run your program, you'll first need to copy your MPICH installation to all the included machines in your hostfile. If you have an NFS environment, it may be easier to install MPICH to a network directory available on all machine. Same goes for your executable. It must be present at the same filesystem location on all machines in order for mpiexec to find and run it. Ken On 10/22/2014 02:04 AM, Md. Amjad Hossain wrote:

Thank you so much Ken for your reply.

Do I have to copy executable file to all machines? what I am doing is, coding, compiling and running on a single machine and host_file contains name of the other machines.

I have run the command you gave me to run. it is printing the only name of the machine I am executing command and showing all previous errors. Here are the outputs after running the command twice:

[mhossain@md-lin-01 mpi_hello_world]$ /usr/lib64/mpich/bin/mpirun -n 4 -f host_file hostname md-lin-01.mcs.kent.edu <http://md-lin-01.mcs.kent.edu> [proxy:0:[email protected] <mailto:proxy%3A0%[email protected]>] launch_procs (./pm/pmiserv/pmip_cb.c:648): unable to change wdir to /home/mhossain/testMpi/mpi_hello_world (No such file or directory) [proxy:0:[email protected] <mailto:proxy%3A0%[email protected]>] HYD_pmcd_pmip_control_cmd_cb (./pm/pmiserv/pmip_cb.c:893): launch_procs returned error [proxy:0:[email protected] <mailto:proxy%3A0%[email protected]>] HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_poll.c:77): callback returned error status [proxy:0:[email protected] <mailto:proxy%3A0%[email protected]>] main (./pm/pmiserv/pmip.c:206): demux engine error waiting for event [[email protected] <mailto:[email protected]>] control_cb (./pm/pmiserv/pmiserv_cb.c:202): assert (!closed) failed [[email protected] <mailto:[email protected]>] HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_poll.c:77): callback returned error status [[email protected] <mailto:[email protected]>] HYD_pmci_wait_for_completion (./pm/pmiserv/pmiserv_pmci.c:197): error waiting for event [[email protected] <mailto:[email protected]>] main (./ui/mpich/mpiexec.c:331): process manager error waiting for completion

[mhossain@md-lin-01 mpi_hello_world]$ /usr/lib64/mpich/bin/mpirun -n 4 -f host_file hostname md-lin-01.mcs.kent.edu <http://md-lin-01.mcs.kent.edu> [[email protected] <mailto:[email protected]>] control_cb (./pm/pmiserv/pmiserv_cb.c:202): assert (!closed) failed [[email protected] <mailto:[email protected]>] HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_poll.c:77): callback returned error status [[email protected] <mailto:[email protected]>] HYD_pmci_wait_for_completion (./pm/pmiserv/pmiserv_pmci.c:197): error waiting for event [[email protected] <mailto:[email protected]>] main (./ui/mpich/mpiexec.c:331): process manager error waiting for completion

Is this problem with configuration or MPICH version?

Regards Amjad

Does your mpi_hello_world binary exist in the same directory on all the machines you are trying to run on? Can you try running this:

/usr/lib64/mpich/bin/mpirun -n 4 -f host_file hostname

If it outputs the names of the hosts in your hostfile, we can be confident that your mpirun and ssh setup is functioning correctly.

Ken

On 10/21/2014 12:09 AM, Md. Amjad Hossain wrote: > Hi I am trying to run simple hello world program on cluster nodes. I am > running it by following command but getting errors: > > Command: /usr/lib64/mpich/bin/mpirun -n 4 -f host_file ./mpi_hello_world > > errors: > [[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>] > control_cb (./pm/pmiserv/pmiserv_cb.c:202): assert (!closed) failed > [[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>] > HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_poll.c:77): callback > returned error status > [[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>] > HYD_pmci_wait_for_completion (./pm/pmiserv/pmiserv_pmci.c:197): error > waiting for event > [[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>] > main (./ui/mpich/mpiexec.c:331): process manager error waiting for > completion > > > Before running the command I am setting variables MPIRUN =mpi diretory > and MPI_HOSTS=host_file. The "host_file" has four nodes and they can ssh > to each other without password. > > MPICH version I am running is: 3.0.4. The MPI code is attached. > > Any help to solve the problem please? > > > > > >

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