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 world' call MPI_FINALIZE(ierror) end 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 host2.domain host1.domain 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 mpitests-openmpi-4.1-1.el7.x86_64 openmpi-1.10.6-2.el7.x86_64 openmpi-devel-1.10.6-2.el7.x86_64 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 MPI_COMPILER=openmpi-x86_64 OMPI_F77=ifort OMPI_FC=ifort OMPI_MCA_mpi_yield_when_idle=1 OMPI_MCA_btl=tcp,self 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" host1.domain Any suggestions on how to solve this problem are appreciated. Bill
ompi_info_all_host1.bz2
Description: BZip2 compressed data
ompi_info_all_host2.bz2
Description: BZip2 compressed data
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