[MPICH] problem net_send: could not write to fd=5, errno = 32

[Luiz Mendes]

Hi Geoff,

i dont know Geoff, the code is below:

#include "mpi.h"
#include <stdio.h>
#include <string.h>
int main(int argc, char* argv[])
{
    char mensagem[32];
    int numprocs, rank;
    MPI_Status stat;
    MPI_Init(&argc,&argv);
    MPI_Comm_size(MPI_COMM_WORLD,&numprocs);
    MPI_Comm_rank(MPI_COMM_WORLD,&rank);
    if(rank==0)
    {
        sprintf(mensagem, "Message Text");
        MPI_Send(mensagem, 32, MPI_CHAR, 1, 0, MPI_COMM_WORLD);
    }
    else
    {
        MPI_Recv(mensagem, 32, MPI_CHAR, 0, 0, MPI_COMM_WORLD, &stat);
    }
}

when i run with mpirun -np 2 it works, and when i run with mpirun -np 3 i
doesnt run and relates the following message below

p2_23214:  p4_error: net_recv read:  probable EOF on socket: 1
bm_list_23184: (0.507200) wakeup_slave: unable to interrupt slave 0 pid
23183
rm_l_1_23213: (0.257494) net_send: could not write to fd=6, errno = 9
rm_l_1_23213:  p4_error: net_send write: -1
    p4_error: latest msg from perror: Bad file descriptor
rm_l_2_23236: (0.045590) net_send: could not write to fd=5, errno = 32
p2_23214: (2.046247) net_send: could not write to fd=5, errno = 32


What it could  be?

I installed MPICH 1.2.7p1 with mode p4 i think. I am trying to run it on two
PCS. I installed MPI in /usr/share/MPI-1 folder and share this one by NFS
server with another PC.

Well i was trying to run another standard example simpleio.c, and it doesnt
store things in other PC.

What is happening?

Thanks,
Luiz Mendes

2007/1/15, Geoff Jacobs <gdjacobs at gmail.com>:
>
> Luiz Mendes wrote:
> > HI all,
> >
> > i would like to know whats the reason for this error
> >
> > net_send: could not write to fd=5, errno = 32
> >
> > what should i do to correct this? I searched for this error in internet
> > but i didnt find anything about.
> >
> > Its strange, because this error is caused by the increase of number of
> > processes in the execution of mpi program.
> >
> > Could you help me?
> >
> > Thanks
> > Luiz Mendes
> Segfault?
>
> --
> Geoffrey D. Jacobs
>
> Go to the Chinese Restaurant,
> Order the Special
>
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