[mpich-discuss] Fatal error in PMPI_Reduce: Other MPI error, error stac

[T.R. Sanderson]

Hello, I've been testing my MPICH2 installation with cpi and am having some 
issues. Cpi runs fine on either computer. If I add two nodes to my hosts 
file I receive the error below, if I only have one node in the host file it 
runs happily even if executed via MPI.

I would be very grateful for any advice, if you would like the verbose 
output just let me know.

Many thanks,
Theo

trs38 at node0:~$ mpiexec.hydra -l -n 2 /root/mpich2-1.3.2/examples/cpi [1] 
Process 1 of 2 is on node2 [0] Process 0 of 2 is on node1 [0] Fatal error 
in PMPI_Reduce: Other MPI error, error stack: [0] 
PMPI_Reduce(1322)...............: MPI_Reduce(sbuf=0x7fffbfe9d028, 
rbuf=0x7fffbfe9d020, count=1, MPI_DOUBLE, MPI_SUM, root=0, MPI_COMM_WORLD) 
failed [0] MPIR_Reduce_impl(1139)..........: [0] 
MPIR_Reduce_intra(947)..........: [0] MPIR_Reduce_binomial(176).......: [0] 
MPIDI_CH3U_Recvq_FDU_or_AEP(380): Communication error with rank 1 
[mpiexec at node0] ONE OF THE PROCESSES TERMINATED BADLY: CLEANING UP 
[proxy:0:1 at node2] HYD_pmcd_pmip_control_cmd_cb 
(./pm/pmiserv/pmip_cb.c:868): assert (!closed) failed [proxy:0:1 at node2] 
HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_poll.c:77): callback 
returned error status [proxy:0:1 at node2] main (./pm/pmiserv/pmip.c:208): 
demux engine error waiting for event APPLICATION TERMINATED WITH THE EXIT 
STRING: Hangup (signal 1)