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<div class="">Hi Toni,</div>
<div class=""><br class="">
</div>
<div class="">We figured out the reason (the spawned processes hang because when the "hosts" info keys for two commands have the same value (e.g., localhost) two processes get the same rank.), but it seems it will take some time to fix this. Pavan will rewrite
the problematic part in hydra.</div>
<div class=""><br class="">
</div>
<div class="">I’ve created a ticket (<a href="https://trac.mpich.org/projects/mpich/ticket/2308" class="">https://trac.mpich.org/projects/mpich/ticket/2308</a>) for this issue and cc’ed you in the ticket.</div>
<div class=""><br class="">
</div>
<div class="">Regards,</div>
<div class="">Sangmin</div>
<div class=""><br class="">
</div>
<br class="">
<div>
<blockquote type="cite" class="">
<div class="">On Oct 8, 2015, at 10:17 AM, Antonio J. Peña <<a href="mailto:antonio.pena@bsc.es" class="">antonio.pena@bsc.es</a>> wrote:</div>
<br class="Apple-interchange-newline">
<div class=""><br class="">
Thanks a lot Sangmin!<br class="">
<br class="">
<br class="">
On 10/08/2015 03:43 PM, Seo, Sangmin wrote:<br class="">
<blockquote type="cite" class="">Hi Toni,<br class="">
<br class="">
I confirmed the problem and am looking into it. I will get back to you after I resolve it.<br class="">
<br class="">
Regards,<br class="">
Sangmin<br class="">
<br class="">
<br class="">
<blockquote type="cite" class="">On Oct 6, 2015, at 7:23 AM, Antonio J. Peña <<a href="mailto:antonio.pena@bsc.es" class="">antonio.pena@bsc.es</a>> wrote:<br class="">
<br class="">
<br class="">
Right, but I do need to use the hosts key to get control of where the processes are spawned. Any clue?<br class="">
<br class="">
<br class="">
On 10/02/2015 07:32 PM, Thakur, Rajeev wrote:<br class="">
<blockquote type="cite" class="">Looks like it is related to the hosts key. Works without that.<br class="">
<br class="">
Rajeev<br class="">
<br class="">
<blockquote type="cite" class="">On Oct 2, 2015, at 10:34 AM, Antonio J. Peña <<a href="mailto:antonio.pena@bsc.es" class="">antonio.pena@bsc.es</a>> wrote:<br class="">
<br class="">
Hi folks!<br class="">
<br class="">
I've been facing an issue with MPI_Comm_spawn_multiple when all the<br class="">
following conditions are met:<br class="">
<br class="">
1. 'count' is > 1<br class="">
2. Any value of 'array_of_maxprocs' is > 1<br class="">
3. Setting the "hosts" info key<br class="">
<br class="">
What I'm finding is that the spawned processes hang at MPI_Init. Find<br class="">
attached a test case. You can reproduce my issue with -np 1.<br class="">
<br class="">
Is there anything I'm doing wrong? I'm using MPICH master at 1e6c4d8. I<br class="">
haven't found a pending ticket, xfail test, or test case covering this<br class="">
situation.<br class="">
<br class="">
All the best,<br class="">
Toni<br class="">
<br class="">
[P.S.: It still feels weird to be on the other side of <a href="mailto:discuss@mpich.org" class="">
discuss@mpich.org</a>]<br class="">
<br class="">
-- <br class="">
Antonio J. Peña<br class="">
Senior Researcher<br class="">
Barcelona Supercomputing Center<br class="">
<br class="">
<br class="">
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Senior Researcher<br class="">
Barcelona Supercomputing Center<br class="">
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