Hello In playing around with process management routines, I found another issue. This one might very well be operator error, or something implementation specific.
I've got two processes (a and b), linked with openmpi, but started independently (no mpiexec). - A starts up and calls MPI_Init - A calls MPI_Open_port, prints out the port name to stdout, then calls MPI_Comm_accept and blocks. - B takes as a command line argument the port name printed out by A. It calls MPI_Init and then and passes that port name to MPI_Comm_connect - B gets the following error: [leela.mcs.anl.gov:04177] [0,0,0] ORTE_ERROR_LOG: Pack data mismatch in file ../../../orte/dps/dps_unpack.c at line 121 [leela.mcs.anl.gov:04177] [0,0,0] ORTE_ERROR_LOG: Pack data mismatch in file ../../../orte/dps/dps_unpack.c at line 95 [leela.mcs.anl.gov:04177] *** An error occurred in MPI_Comm_connect [leela.mcs.anl.gov:04177] *** on communicator MPI_COMM_WORLD [leela.mcs.anl.gov:04177] *** MPI_ERR_UNKNOWN: unknown error [leela.mcs.anl.gov:04177] *** MPI_ERRORS_ARE_FATAL (goodbye) [leela.mcs.anl.gov:04177] [0,0,0] ORTE_ERROR_LOG: Not found in file ../../../../../orte/mca/pls/base/pls_base_proxy.c at line 183 - A is still waiting for someone to connect to it. Did I pass MPI port strings between programs the correct way, or is MPI_Publish_name/MPI_Lookup_name the prefered way to pass around this information? Thanks ==rob -- Rob Latham Mathematics and Computer Science Division A215 0178 EA2D B059 8CDF Argonne National Labs, IL USA B29D F333 664A 4280 315B
