[mvapich-discuss] No route to host in MVAPICH-Virt

[Jie Zhang]

Hi,  Maksym,

This should be a network setup issue.
Can you please try a few things:

1. Do you have correct IP/hostname mapping for both hosts in the file, such
as /etc/hosts
2. What is the output if you run /opt/mvapich2/virt/2.2/bin/mpirun_rsh  -np
2 host11 host12 MV2_VIRT_USE_IVSHMEM=1 hostname


On Tue, Jul 4, 2017 at 11:01 AM Maksym Planeta <
mplaneta at os.inf.tu-dresden.de> wrote:

> Hello,
>
> I have setup several virtual machines and I'm trying to run simple MPI
> programs in there.
>
> My current test is following:
>
> /opt/mvapich2/virt/2.2/bin/mpirun_rsh  -export-all -n 2 host11 host12
> MV2_VIRT_USE_IVSHMEM=1 bash -c 'netstat -l | grep $(printenv
> MPISPAWN_CHECKIN_PORT)'
> tcp        0      0 0.0.0.0:49379           0.0.0.0:*               LISTEN
> connect [mt_checkin]: No route to host
> [host11:mpirun_rsh][child_handler] Error in init phase, aborting! (1/2
> mpispawn connections)
>
> So I'm trying to look if the checkin port is open. But the remote host
> connection fails with a message "no route to host".
>
> Showing the command which is about to be executed gives me this:
>
> $ /opt/mvapich2/virt/2.2/bin/mpirun_rsh -show  -export-all -n 2 host11
> host12 MV2_VIRT_USE_IVSHMEM=1 bash -c 'netstat -l | grep $(printenv
> MPISPAWN_CHECKIN_PORT)'
> /usr/bin/ssh -q host12 cd /home/user; /usr/bin/env  MPISPAWN_MPIRUN_MPD=0
> USE_LINEAR_SSH=1 MPISPAWN_MPIRUN_HOST=host11
> MPISPAWN_MPIRUN_HOSTIP=141.76.84.15 MPIRUN_RSH_LAUNCH=1
> MPISPAWN_CHECKIN_PORT=52056 MPISPAWN_MPIRUN_PORT=52056 MPISPAWN_NNODES=2
> MPISPAWN_GLOBAL_NPROCS=2 MPISPAWN_MPIRUN_ID=5190 MPISPAWN_ARGC=3
> MPDMAN_KVS_TEMPLATE=kvs_506_host11_5190 MPISPAWN_LOCAL_NPROCS=1
> MPISPAWN_ARGV_0='bash' MPISPAWN_ARGV_1='-c' MPISPAWN_ARGV_2='netstat -l |
> grep $(printenv MPISPAWN_CHECKIN_PORT)' MPISPAWN_ARGC=3
> MPISPAWN_GENERIC_ENV_COUNT=1  MPISPAWN_GENERIC_NAME_0=MV2_VIRT_USE_IVSHMEM
> MPISPAWN_GENERIC_VALUE_0=1 MPISPAWN_ID=1 MPISPAWN_WORKING_DIR=/home/user
> MPISPAWN_MPIRUN_RANK_0=1  /opt/mvapich2/virt/2.2/bin/mpispawn 0
>
> /usr/bin/bash -c cd /home/user; /usr/bin/env  MPISPAWN_MPIRUN_MPD=0
> USE_LINEAR_SSH=1 MPISPAWN_MPIRUN_HOST=host11
> MPISPAWN_MPIRUN_HOSTIP=141.76.84.15 MPIRUN_RSH_LAUNCH=1
> MPISPAWN_CHECKIN_PORT=52056 MPISPAWN_MPIRUN_PORT=52056 MPISPAWN_NNODES=2
> MPISPAWN_GLOBAL_NPROCS=2 MPISPAWN_MPIRUN_ID=5190 MPISPAWN_ARGC=3
> MPDMAN_KVS_TEMPLATE=kvs_506_host11_5190 MPISPAWN_LOCAL_NPROCS=1
> MPISPAWN_ARGV_0='bash' MPISPAWN_ARGV_1='-c' MPISPAWN_ARGV_2='netstat -l |
> grep $(printenv MPISPAWN_CHECKIN_PORT)' MPISPAWN_ARGC=3
> MPISPAWN_GENERIC_ENV_COUNT=1  MPISPAWN_GENERIC_NAME_0=MV2_VIRT_USE_IVSHMEM
> MPISPAWN_GENERIC_VALUE_0=1 MPISPAWN_ID=0 MPISPAWN_WORKING_DIR=/home/user
> MPISPAWN_MPIRUN_RANK_0=0  /opt/mvapich2/virt/2.2/bin/mpispawn 0
>
>
> I can reach both hosts from each other and they see the same IP addresses,
> and I can ssh to each of the two hosts from each of the two hosts.
>
>
> Could you help me to identify the issue?
>
> The MVAPICH-Virt version is the last accessible on the mvapich download
> page
>
> P. S.
>
> You say to allow reading for the user in section 5 of the Virt user
> manual, but actually the library asks for write access as well, so I set up
> rights to 766.
>
> --
> Regards,
> Maksym Planeta
>
> _______________________________________________
> mvapich-discuss mailing list
> mvapich-discuss at cse.ohio-state.edu
> http://mailman.cse.ohio-state.edu/mailman/listinfo/mvapich-discuss
>
-- 
Thanks,
-Jie

--------------------------------------------
Department of Computer Science & Engineering
Erwin E. Dreese Laboratories, 2015 Neil Avenue
Ohio State University
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