<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Hi Mandar,</DIV>
<DIV>Thanks for your prompt response. I finally found the problem. My /etc/hosts was messed up somehow. I removed the w privilige from the file after fixing it. Still I dont know why it happened.</DIV>
<DIV>Deniz.<BR><BR>--- On <B>Wed, 2/2/11, Mandar Gurav <I><mandarwce@gmail.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: Mandar Gurav <mandarwce@gmail.com><BR>Subject: Re: [mpich-discuss] MPI_Send Error<BR>To: mpich-discuss@mcs.anl.gov<BR>Date: Wednesday, February 2, 2011, 7:20 AM<BR><BR>
<DIV id=yiv1859745319>Program is also fine... Working correctly at my end!<BR><BR>----Mandar Gurav<BR><BR>
<DIV class=yiv1859745319gmail_quote>On Wed, Feb 2, 2011 at 5:47 PM, Mandar Gurav <SPAN dir=ltr><<A href="http://us.mc1302.mail.yahoo.com/mc/compose?to=mandarwce@gmail.com" rel=nofollow target=_blank ymailto="mailto:mandarwce@gmail.com">mandarwce@gmail.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0pt 0pt 0pt 0.8ex; PADDING-LEFT: 1ex" class=yiv1859745319gmail_quote>Try to execute the program using <BR>"mpiexec -n 2 ./test.x" only<BR><BR>or can you tell what is there in your "hosts" (Described in command "mpiexec -f <U><B>hosts</B></U> -n 2 ./test.x<B>"</B>) file<BR><BR>----Mandar Gurav<BR><BR>
<DIV class=yiv1859745319gmail_quote>
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<DIV class=yiv1859745319h5>On Wed, Feb 2, 2011 at 4:38 PM, Deniz DAL <SPAN dir=ltr><<A href="http://us.mc1302.mail.yahoo.com/mc/compose?to=dendal25@yahoo.com" rel=nofollow target=_blank ymailto="mailto:dendal25@yahoo.com">dendal25@yahoo.com</A>></SPAN> wrote:<BR></DIV></DIV>
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<DIV>Hello everyone,</DIV>
<DIV>I created a small linux cluster with 4 compute nodes yesterday. I installed Fedora 14 OS to all machine and mpich2 v1.3.2 on the server node. But i have a serious problem. I can not even make a simple send and receive program work. below is the steps that i follow. You will see the error at the end. I can not run point to point and collective communication routines of mpi. I am suspecting that the problem might have sthg to do with the hydra. Any help is appreciated.</DIV>
<DIV>Deniz.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><B>[ddal@admin mpi_uygulamalar]$ cat hosts <BR>admin<BR>cn01<BR>cn02<BR>cn03<BR>[ddal@admin mpi_uygulamalar]$ cat 01_Send_Receive_One_Message.cpp <BR>#include "mpi.h"<BR>#include <iostream><BR>using namespace std;</B></DIV>
<DIV><B>#define TAG 25</B></DIV>
<DIV><B>int main(int argc, char* argv[])<BR>{<BR> int myRank,<BR> size;</B></DIV>
<DIV><B> char processorName[50];<BR> int nameLength;</B></DIV>
<DIV><B> int a;//size of the send buffer<BR> int b;</B></DIV>
<DIV><B> MPI_Status status;</B></DIV>
<DIV><B> /* Initialize MPI */<BR> MPI_Init(&argc, &argv);</B></DIV>
<DIV><B> /* Determine the size of the group */<BR> MPI_Comm_size(MPI_COMM_WORLD,&size);</B></DIV>
<DIV><B> /* Determine the rank of the calling process */<BR> MPI_Comm_rank(MPI_COMM_WORLD,&myRank);</B></DIV>
<DIV><B> MPI_Get_processor_name(processorName, &nameLength);</B></DIV>
<DIV><B> if(size != 2 )<BR> {<BR> cout<<"Number of CPUs must be 2 !\n";<BR> MPI_Abort(MPI_COMM_WORLD, 99);<BR> }</B></DIV>
<DIV><B> if(myRank == 0)/* Master Sends a Message */<BR> {<BR> a=25;</B></DIV>
<DIV><B> MPI_Send(&a, 1, MPI_INT, 1, TAG, MPI_COMM_WORLD);<BR> printf("%s Sent Variable a Successfully\n",processorName);<BR> }<BR> else /* Process 1 Receives the Message */<BR> {<BR> MPI_Recv(&b, 1, MPI_INT, 0, TAG, MPI_COMM_WORLD, &status );<BR> printf("%s Received Variable a Successfully over b\n",processorName);<BR> printf("b=%d\n",b);<BR> }</B></DIV>
<DIV><B> /* Terminate the MPI */<BR> MPI_Finalize();</B></DIV>
<DIV><B> return 0;<BR>}[ddal@admin mpi_uygulamalar]$ mpicxx 01_Send_Receive_One_Message.cpp -o test.x <BR>[ddal@admin mpi_uygulamalar]$ mpiexec -f hosts -n 2 ./test.x <BR>Fatal error in MPI_Send: Other MPI error, error stack:<BR>MPI_Send(173)..............: MPI_Send(buf=0xbf928900, count=1, MPI_INT, dest=1, tag=25, MPI_COMM_WORLD) failed<BR>MPID_nem_tcp_connpoll(1811): Communication error with rank 1: <BR>[mpiexec@admin] ONE OF THE PROCESSES TERMINATED BADLY: CLEANING UP<BR>[proxy:0:1@cn01] HYD_pmcd_pmip_control_cmd_cb (./pm/pmiserv/pmip_cb.c:868): assert (!closed) failed<BR>[proxy:0:1@cn01] HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_poll.c:77): callback returned error status<BR>[proxy:0:1@cn01] main (./pm/pmiserv/pmip.c:208): demux engine error waiting for event<BR>APPLICATION TERMINATED WITH THE EXIT STRING: Hangup (signal 1)<BR>[ddal@admin mpi_uygulamalar]$
</B></DIV></TD></TR></TBODY></TABLE><BR><BR></DIV></DIV>_______________________________________________<BR>mpich-discuss mailing list<BR><A href="http://us.mc1302.mail.yahoo.com/mc/compose?to=mpich-discuss@mcs.anl.gov" rel=nofollow target=_blank ymailto="mailto:mpich-discuss@mcs.anl.gov">mpich-discuss@mcs.anl.gov</A><BR><A href="https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss" rel=nofollow target=_blank>https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss</A><BR><BR></BLOCKQUOTE></DIV><BR><BR clear=all><BR>-- <BR><FONT color=#888888>|||| Mandar Gurav ||||<BR></FONT></BLOCKQUOTE></DIV><BR><BR clear=all><BR>-- <BR>|||| Mandar Gurav ||||<BR></DIV><BR>-----Inline Attachment Follows-----<BR><BR>
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