Hi folks! I've been facing an issue with MPI_Comm_spawn_multiple when all the following conditions are met: 1. 'count' is > 1 2. Any value of 'array_of_maxprocs' is > 1 3. Setting the "hosts" info key What I'm finding is that the spawned processes hang at MPI_Init. Find attached a test case. You can reproduce my issue with -np 1. Is there anything I'm doing wrong? I'm using MPICH master at 1e6c4d8. I haven't found a pending ticket, xfail test, or test case covering this situation. All the best, Toni [P.S.: It still feels weird to be on the other side of [email protected]] -- Antonio J. Peña Senior Researcher Barcelona Supercomputing Center WARNING / LEGAL TEXT: This message is intended only for the use of the individual or entity to which it is addressed and may contain information which is privileged, confidential, proprietary, or exempt from disclosure under applicable law. If you are not the intended recipient or the person responsible for delivering the message to the intended recipient, you are strictly prohibited from disclosing, distributing, copying, or in any way using this message. If you have received this communication in error, please notify the sender and destroy and delete any copies you may have received. http://www.bsc.es/disclaimer _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss