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

[Anthony Chan]

On Mon, 15 Jan 2007, Luiz Mendes wrote:

> 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);
>     }
> }

Your code needs "MPI_Finalize" to be a valid MPI program.

A.Chan

>
> 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
> >
>