[mvapich-discuss] Too many communicators

[Ryan Crocker]

Hi all, 

So i can't seem to find the answer to this question.  I keep getting the failure "Too many communicators".  Could someone explain what calls "use up" communicators, and could i be calling/using more than the default total?.  I'm trying to debug my code so i can free up the communicators and not just repeatedly create them.  I'm a bit perplexed with this, probably a lack of  in depth knowledge, but i only run any of my MPI initializations one time then all my calls with mpi are either sums, max, min, allreduce, alltoall.  

thanks

The error:

Fatal error in PMPI_Comm_dup: Other MPI error, error stack:
PMPI_Comm_dup(176)............: MPI_Comm_dup(comm=0x84000000, new_comm=0x7fff5fbfe9a4) failed
PMPI_Comm_dup(161)............: 
MPIR_Comm_dup_impl(55)........: 
MPIR_Comm_copy(967)...........: 
MPIR_Get_contextid(521).......: 
MPIR_Get_contextid_sparse(752): Too many communicators


Ryan Crocker
University of Vermont, School of Engineering
Mechanical Engineering Department
rcrocker at uvm.edu
315-212-7331

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