On Sep 16, 2009, at 9:53 PM, Ralph Castain wrote:
Only the obvious, and not very helpful one: comm_spawn isn't thread safe at this time. You'll need to serialize your requests to that function.
This is likely the cause of your issues if you are calling MPI_COMM_SPAWN in multiple threads simultaneously. Can you verify?
If not, we'll need to dig a little deeper to figure out what's going on. But Ralph is right -- read up on the THREAD_MULTIPLE constraints (check the OMPI README file) to see if that's what's biting you.
-- Jeff Squyres jsquy...@cisco.com
