[mpich-discuss] I wonder if my mpdboot is the cause of problem...help me!

[Pavan Balaji]

Does mpdtrace show both nodes? Which version of MPICH2 are you using?

  -- Pavan

On 07/18/2009 12:05 AM, Gra zeus wrote:
> hello,
> 
> thx for answer yesterday.
> I tested my code in one machine (with"mpiexec -n 2 ./myprog"),everything 
> work fine - my program can use MPI_Send,MPI_Recv without any problems.
> 
> today, I setup mpich2 on two machines. Both machines can communicate 
> with others, ssh are tested on both machines, mpd work, mpdringtest work.
> 
> however,when i run my program that use MPI_Send and MPI_Recv,  MPI_Recv 
> is blocked forever.
> so i write new simple code to test MPI_Send,MPI_Recv like this
> 
>         int myrank;
>         MPI_Status status;
> MPI_Init( &argc, &argv );
> MPI_Comm_rank( MPI_COMM_WORLD, &myrank );
> if (myrank == 0) 
> {
> int senddata = 1;
> MPI_Send(&senddata, 1, MPI_INT, 1, 0, MPI_COMM_WORLD);
> }
> else if (myrank == 1) 
> {
> int recvdata = 0;
> MPI_Recv(&recvdata, 1, MPI_INT, 0, 0, MPI_COMM_WORLD, &status);
> printf("received :%d:\n", recvdata);
> }
> MPI_Finalize();
> 
> 
> i got this error
> 
> 
> Assertion failed in file ch3_progress.c at line 489: pkt->type >= 0 && 
> pkt->type < MPIDI_NEM_PKT_END
> internal ABORT - process 1
> Fatal error in MPI_Finalize: Other MPI error, error stack:
> MPI_Finalize(315)..................: MPI_Finalize failed
> MPI_Finalize(207)..................: 
> MPID_Finalize(92)..................: 
> PMPI_Barrier(476)..................: MPI_Barrier(comm=0x44000002) failed
> MPIR_Barrier(82)...................: 
> MPIC_Sendrecv(164).................: 
> MPIC_Wait(405).....................: 
> MPIDI_CH3I_Progress(150)...........: 
> MPID_nem_mpich2_blocking_recv(1074): 
> MPID_nem_tcp_connpoll(1667)........: 
> state_commrdy_handler(1517)........: 
> MPID_nem_tcp_recv_handler(1413)....: socket closed
> 
> ////////////////////////////////////////////////////////////////
> 
> I also tried example/cpi that come with install package -> result is the 
> example program freezed, without any errors.(I assume it stopped at 
> MPI_Bcast())
> 
> Can anyone help me with this?
> This code and my program can run smoothly when I use 1 machine (with 
> option ,  -n 2, -n 4 .... etc) but whenever I start mpdboot with 2 
> machines, mpi processes can't communicate with other mpi processes via 
> MPI_Send,MPI_Recv.
> 
> thx,
> gra
> 
> 
> 

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji