When I try to run an MPI program on a network with a shared file system and
connected by ethernet, I get the error message "tcp_peer_send_blocking:
send() to socket 9 failed: Broken pipe (32)" followed by some suggestions
of what could cause it, none of which are my problem.  I have searched the
FAQ, mailing list archives, and googled the error message, with only a few
hits touching on it, none of which solved the problem.

This is on a Linux CentOS 7 system with Open MPI 1.10.6 and Intel Fortran
(more detailed system information below).

Here are details on how I encounter the problem:

me@host1> cat hellompi.f90
   program hello
   include 'mpif.h'
   integer rank, size, ierror, nl
   character(len=MPI_MAX_PROCESSOR_NAME) :: hostname

   call MPI_INIT(ierror)
   call MPI_COMM_SIZE(MPI_COMM_WORLD, size, ierror)
   call MPI_COMM_RANK(MPI_COMM_WORLD, rank, ierror)
   call MPI_GET_PROCESSOR_NAME(hostname, nl, ierror)
   print*, 'node', rank, ' of', size, ' on ', hostname(1:nl), ': Hello
   call MPI_FINALIZE(ierror)

me@host1> mpifort --showme
ifort -I/usr/include/openmpi-x86_64 -pthread -m64 -I/usr/lib64/openmpi/lib
-Wl,-rpath -Wl,/usr/lib64/openmpi/lib -Wl,--enable-new-dtags
-L/usr/lib64/openmpi/lib -lmpi_usempi -lmpi_mpifh -lmpi

me@host1> ifort --version
ifort (IFORT) 18.0.0 20170811
Copyright (C) 1985-2017 Intel Corporation.  All rights reserved.

me@host1> mpifort -o hellompi hellompi.f90

[Note: it runs on 1 machine, but not on two]

me@host1> mpirun -np 2 hellompi
 node           0  of           2  on host1.domain: Hello world
 node           1  of           2  on host1.domain: Hello world

me@host1> cat hosts

me@host1> mpirun -np 2 --hostfile hosts hellompi
[host2.domain:250313] [[46562,0],1] tcp_peer_send_blocking: send() to
socket 9 failed: Broken pipe (32)
ORTE was unable to reliably start one or more daemons.
This usually is caused by:
[suggested causes deleted]

Here is system information:

me@host2> cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)

me@host1> uname -a
Linux host1.domain 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 20:13:58
UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

me@host1> rpm -qa | grep openmpi

me@host1> ompi_info --all
[Results of this command for each host are in the attached files.]

me@host1> ompi_info -v ompi full --parsable
ompi_info: Error: unknown option "-v"
[Is the request to run that command given on the Open MPI "Getting Help"
web page an error?]

me@host1> printenv | grep OMPI

I am using ssh-agent, and I can ssh between the two hosts.  In fact, from
host1 I can use ssh to request that host2 ssh back to host1:

me@host1> ssh -A host2 "ssh host1 hostname"

Any suggestions on how to solve this problem are appreciated.


Attachment: ompi_info_all_host1.bz2
Description: BZip2 compressed data

Attachment: ompi_info_all_host2.bz2
Description: BZip2 compressed data

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