[MPICH] MPICH2 does not work over Windows XP network with ib card

[Rajeev Thakur]

John,
     In our upcoming release (in a couple of weeks) we do things quite
differently in this part of the code, and hopefully this problem will not be
there. In the meanwhile, if you can send us a small test program, we would
be happy to test it with the new code.

Rajeev 

> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov 
> [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of John Robinson
> Sent: Thursday, November 03, 2005 8:53 AM
> To: mpich-discuss at mcs.anl.gov
> Subject: [MPICH] MPICH2 does not work over Windows XP network 
> with ib card
> 
> Good morning everyone,
> 
> New to this list, so please forgive if this is not quite the 
> right forum 
> (and redirect me) - thanks!.
> 
> I have a setup where the cluster is running a long-lived 
> server process 
> that uses mpi_comm_accept to receive new client connections, and 
> single-process client processes that call mpi_comm_connect to 
> submit work.
> 
> The problem happens after the first client process has 
> completed and a 
> new one tries to connect.  I get the following fatal error from the 
> server processes:
> 
> MPI_Comm_accept(116): 
> MPI_Comm_accept(port="port#35267$description#jr$", 
> MPI_INFO_NULL, root=0, comm=0x84000001, newcomm=0xbf89b370) failed
> MPID_Comm_accept(29):
> MPIDI_CH3_Comm_accept(598):
> MPIDI_CH3I_Add_to_bizcard_cache(58): business card in cache: 
> port#35268$description#jr$, business card passed: 
> port#35269$description#jr$
> 
> The accept code looks like:
> 
>     impl->acceptComm = MPI::COMM_WORLD.Dup( ); // Intracomm for new 
> connections
>     MPI::Intercomm clientComm;        // result of Accept() call
>     clientComm = impl->acceptComm.Accept(impl->serverPort, 
> MPI_INFO_NULL, 0);
> 
> The connect is:
> 
>         MPI::Intercomm clientComm;        // result of Connect() call
>         clientComm = MPI::COMM_SELF.Connect( impl->serverPort, 
> MPI_INFO_NULL, 0);
> 
> One detail that may be relevant is that the client process is 
> started on 
> demand from a master process that forks the process that 
> eventually does 
> the connect().  So the original mpd job (the master process) is 
> long-lived, but more than one separate forked processes are calling 
> MPI_Init/Finalize.  Does each of these need to be a separate MPI job?
> 
> MPICH version: mpich2-1.0.2p1
> 
> thanks,
> /jr
> 
>