[mpich-discuss] MPID_nem_tcp_connpoll(1826): Communication error with rank 0: Connection refused

[Miguel Angel Fernández]

Hello again
I'm still trying to fix the problem I told you days ago.I configured all cluster machines for executing mpiexec as root on any cases and the problem is the same.Is it necesary to configure a password for hydra as I had to do for mpd?
Thank you in advanceMiguel Ángel

> From: thakur at mcs.anl.gov
> Date: Sat, 22 Oct 2011 15:30:26 -0500
> To: mpich-discuss at mcs.anl.gov
> Subject: Re: [mpich-discuss] MPID_nem_tcp_connpoll(1826): Communication	error with rank 0: Connection refused
> 
> Make sure the 5 machines can communicate with each other, i.e., there is no firewall preventing connections.
> 
> Rajeev
> 
> On Oct 22, 2011, at 12:36 PM, Miguel Angel Fernández wrote:
> 
> > Hello everybody
> > 
> > I'm trying to fix a problem that appear when I execute one of the mpich2 program examples.
> > As you can see, if I execute a normal command there are no problems. The cluster work properly.
> > 
> > mpi at mpi0:~$ mpiexec -f ./mpich2-install/machinefile -n 5 hostname
> > mpi0
> > mpi2
> > mpi3
> > mpi1
> > mpi4
> > mpi at mpi0:~$
> > 
> > but when I try to execute the program, the results are something like this
> > 
> > mpi at mpi0:~$ mpiexec -f ./mpich2-install/machinefile -n 5 /home/mpi/mpich2-install/workspace/Prueba/Debug/Prueba
> > Hello MPI World the original.
> > Hello MPI World the original.
> > Hello MPI World the original.
> > Hello MPI World the original.
> > Hello MPI World the original.
> > From process 0: Num processes: 5
> > Fatal error in MPI_Send: Other MPI error, error stack:
> > MPI_Send(173)..............: MPI_Send(buf=0xbfcbe268, count=26, MPI_CHAR, dest=0, tag=0, MPI_COMM_WORLD) failed
> > MPID_nem_tcp_connpoll(1826): Communication error with rank 0: Connection refused
> > Fatal error in MPI_Send: Other MPI error, error stack:
> > MPI_Send(173)..............: MPI_Send(buf=0xbfb32ca8, count=26, MPI_CHAR, dest=0, tag=0, MPI_COMM_WORLD) failed
> > MPID_nem_tcp_connpoll(1826): Communication error with rank 0: Connection refused
> > Fatal error in MPI_Send: Other MPI error, error stack:
> > MPI_Send(173)..............: MPI_Send(buf=0xbfa49e98, count=26, MPI_CHAR, dest=0, tag=0, MPI_COMM_WORLD) failed
> > MPID_nem_tcp_connpoll(1826): Communication error with rank 0: Connection refused
> > Fatal error in MPI_Send: Other MPI error, error stack:
> > MPI_Send(173)..............: MPI_Send(buf=0xbfa57538, count=26, MPI_CHAR, dest=0, tag=0, MPI_COMM_WORLD) failed
> > MPID_nem_tcp_connpoll(1826): Communication error with rank 0: Connection refused
> > 
> > Do you have any idea what can be the problem?
> > 
> > Thank you in advance
> > Miguel Angel
> > 
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