It may be there from a long time ago. When the OOB loses a connection, nothing is supposed to happen unless that connection is defined as a "lifeline". Remember, the OOB is not an MPI transport - it is there solely to handle support functions and therefore is not considered "mission critical". So losing an OOB connection isn't considered a "fatal" problem unless it is to the "lifeline".
We define a lifeline solely for the case where a daemon dies and we need the local procs to "suicide" and mpirun to terminate the job. So I guess the question is: which connection failed? Was this a connection from a daemon back to mpirun? Or were you running as a direct launch process - i.e., the connection was between two MPI procs that were launched via srun? If so, then there is no "lifeline" - if a connection drops, you are on your own. Not much we can do about that scenario as you really don't want to abort just because a non-critical connection fails. On Jun 26, 2012, at 1:09 AM, ludovic.hab...@ext.bull.net wrote: > Version 1.6. But it's already there in 1.5.4. > > -----devel-boun...@open-mpi.org a écrit : ----- > A : Open MPI Developers <de...@open-mpi.org> > De : Ralph Castain > Envoyé par : devel-boun...@open-mpi.org > Date : 25/06/2012 17:57 > Objet : Re: [OMPI devel] Problem in oob/tcp > > What version? > > On Jun 25, 2012, at 9:53 AM, ludovic.hab...@ext.bull.net wrote: > >> Hi everybody, >> >> I'm facing a problem in orte/oob/tcp/, more particularly in file >> oob_tcp_msg.c. Some network interruptions were making my program hanging and >> not crashing (a basic helloworld). >> >> Thus, I reproduced the problem with gdb, by simulating an error on read >> (jumping from line 357 to 367, oob_tcp_msg.c). Then, openmpi close the >> socket, make the shutdown and then is hanging. >> >> It seems that there is an exception callback function >> (mca_oob_tcp.oob_exception_callback) "planned" but not implemented yet. >> >> Any idea on how to solve this problem ? Or is this the expected behavior >> when we lose connection ? Did I missed anything ? >> >> Thanks in advance, >> >> Ludovic >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel
