On 02/10/2014 09:56 PM, Balaji, Pavan wrote:

That’s really weird. Errno 1 is "permission denied”. I don’t know how that’s happening with gethostbyname.

Can you send your mpiexec command line and a small program that reproduces this error? E.g., if a program that just does MPI_INIT/MPI_FINALIZE reproduces this error, that’ll be best.

— Pavan

Reproduced with current nightly and an mpi hello world program: Fatal error in MPI_Init: Other MPI error, error stack: MPIR_Init_thread(467)..............: MPID_Init(177).....................: channel initialization failed MPIDI_CH3_Init(70).................: MPID_nem_init(319).................: MPID_nem_tcp_init(171).............: MPID_nem_tcp_get_business_card(418): MPID_nem_tcp_init(377).............: gethostbyname failed, i-0000205b (errno 1) For gethostbyname you need to check h_errno - and 1 is HOST_NOT_FOUND, which is the case for the Fedora builders - they cannot resolve even their own hostname. -- Orion Poplawski Technical Manager 303-415-9701 x222 NWRA/CoRA Division FAX: 303-415-9702 3380 Mitchell Lane [email protected] Boulder, CO 80301 http://www.cora.nwra.com