[mpich-discuss] Fatal error in PMPI_Barrier: A process has failed, error stack:

[Tony Ladd]

Rajeev

There is a firewall on svr but its configured to accept all packets on 
the interface connected to the internal domain (where pc5 lives). I had 
already checked that stopping iptables off made no difference, but I 
just tried it again on the cpi example. The result was the same.

Tony


On 03/26/2014 09:45 PM, Rajeev Thakur wrote:
> Is there a firewall on either machine that is in the way of communication?
>
> Rajeev
>
> On Mar 26, 2014, at 8:28 PM, Tony Ladd <tladd at che.ufl.edu>
>   wrote:
>
>> No - you get the same error - it looks as if process 1 (on the remote node) is not starting
>>
>> svr:tladd(netbench)> mpirun -n 2 -f hosts /global/usr/src/mpich-3.0.4/examples/cpi
>> Process 0 of 2 is on svr.che.ufl.edu
>> Fatal error in PMPI_Reduce: A process has failed, error stack:
>> PMPI_Reduce(1217)...............: MPI_Reduce(sbuf=0x7fff30ecced8, rbuf=0x7fff30ecced0, count=1, MPI_DOUBLE,
>>
>> But if I reverse the order in the host file (pc5 first and then svr) apparently both processes start
>>
>> svr:tladd(netbench)> mpirun -n 2 -f hosts /global/usr/src/mpich-3.0.4/examples/cpi
>> Process 1 of 2 is on svr.che.ufl.edu
>> Process 0 of 2 is on pc5
>> Fatal error in PMPI_Reduce: A process has failed, error stack:
>> PMPI_Reduce(1217)...............: MPI_Reduce(sbuf=0x7fff4d776348, rbuf=0x7fff4d776340, count=1, MPI_DOUBLE,
>>
>> But with the same result in the end.
>>
>> Tony
>>
>>
>>
>> On 03/26/2014 08:18 PM, Rajeev Thakur wrote:
>>> Does the cpi example run across two machines?
>>>
>>> Rajeev
>>>
>>> On Mar 26, 2014, at 7:13 PM, Tony Ladd <tladd at che.ufl.edu>
>>>   wrote:
>>>
>>>> Rajeev
>>>>
>>>> Sorry about that. I was switching back and forth from openmpi to mpich. But it does not make a difference. Here is a clean log from a fresh terminal - no mention of openmpi
>>>>
>>>> Tony
>>>>
>>>> PS - its a CentOS 6.5install - should have mentioned it before.
>>>>
>>>> -- 
>>>> Tony Ladd
>>>>
>>>> Chemical Engineering Department
>>>> University of Florida
>>>> Gainesville, Florida 32611-6005
>>>> USA
>>>>
>>>> Email: tladd-"(AT)"-che.ufl.edu
>>>> Web    http://ladd.che.ufl.edu
>>>>
>>>> Tel:   (352)-392-6509
>>>> FAX:   (352)-392-9514
>>>>
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>> -- 
>> Tony Ladd
>>
>> Chemical Engineering Department
>> University of Florida
>> Gainesville, Florida 32611-6005
>> USA
>>
>> Email: tladd-"(AT)"-che.ufl.edu
>> Web    http://ladd.che.ufl.edu
>>
>> Tel:   (352)-392-6509
>> FAX:   (352)-392-9514
>>
>> _______________________________________________
>> discuss mailing list     discuss at mpich.org
>> To manage subscription options or unsubscribe:
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> _______________________________________________
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-- 
Tony Ladd

Chemical Engineering Department
University of Florida
Gainesville, Florida 32611-6005
USA

Email: tladd-"(AT)"-che.ufl.edu
Web    http://ladd.che.ufl.edu

Tel:   (352)-392-6509
FAX:   (352)-392-9514