[mpich2-dev] mpich2-1.4.1 communication error.

[张磊]

I've configured two computers of Ubuntu12.04 with mpich2-1.4.1p1,and it all
works well with the Helloworld program in one machine or two machines
together.
But I got wrong info in running the cpi examples.Before,all two machines
can ping and ssh from each other to the other with no password. and I also
turned off the firewall.(I've checked the uwf-status.) However, when I
running the cpi example, I got these below:

zhang at zhang-Lenovo-IdeaPad-Y470:~/test$ mpiexec -f hosts -np 2 ./cpi
> Process 0 of 2 is on zhang-Lenovo-IdeaPad-Y470
> Process 1 of 2 is on lianjie2
> Fatal error in PMPI_Reduce: Other MPI error, error stack:
> PMPI_Reduce(1270)...............: MPI_Reduce(sbuf=0xbf8f9b18,
> rbuf=0xbf8f9b20, count=1, MPI_DOUBLE, MPI_SUM, root=0, MPI_COMM_WORLD)
> failed
> MPIR_Reduce_impl(1087)..........:
> MPIR_Reduce_intra(895)..........:
> MPIR_Reduce_binomial(144).......:
> MPIDI_CH3U_Recvq_FDU_or_AEP(380): Communication error with rank 1
>
> [mpiexec at zhang-Lenovo-IdeaPad-Y470] control_cb
> (./pm/pmiserv/pmiserv_cb.c:321): assert (!closed) failed
> [mpiexec at zhang-Lenovo-IdeaPad-Y470] HYDT_dmxu_poll_wait_for_event
> (./tools/demux/demux_poll.c:77): callback returned error status
> [mpiexec at zhang-Lenovo-IdeaPad-Y470] HYD_pmci_wait_for_completion
> (./pm/pmiserv/pmiserv_pmci.c:181): error waiting for event
> [mpiexec at zhang-Lenovo-IdeaPad-Y470] main (./ui/mpich/mpiexec.c:405):
> process manager error waiting for completion
>
And the two computers are on a private net 192.168.48.xxx. I would very
strongly appreciate when somebody could give me hint how to cope with this
problem.

Thanks very much in advance for any tip.
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