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<p class="MsoNormal"><span style="font-size:11.0pt">Hi Bruce, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Could you share your job scripts with us? It’ll be helpful to understand how you exactly launches jobs.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">-- <br>
Hui Zhou<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">"Palmer, Bruce J" <Bruce.Palmer@pnnl.gov><br>
<b>Date: </b>Thursday, April 30, 2020 at 9:25 AM<br>
<b>To: </b>"Zhou, Hui" <zhouh@anl.gov>, "discuss@mpich.org" <discuss@mpich.org><br>
<b>Subject: </b>Re: [mpich-discuss] MPICH configure<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Hi Hui,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I checked with the system admins and they say there are no firewall restrictions between nodes. According to them they can talk to any port on any machine.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’ve also followed up on their suggestion that I link with PMI and verified with ldd that the PMI libraries are showing up before MPI in the executables. I still only get 1 process when running with srun.
This is a summary of what I am seeing when I run on 2 nodes (after configuring and building with slurm).</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">MPICH-3.3.1</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Launch with mpiexec: runs okay</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Launch with mpirun: runs okay</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Link with PMI and Launch with srun: only get 1 process (from MPI_Comm_size on MPI_COMM_WORLD)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">MPICH-3.3.2</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Launch with mpiexec: hangs</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Launch with mpirun: hangs</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Link with PMI and Launch with srun: only get 1 process (from MPI_Comm_size on MPI_COMM_WORLD)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">For what it’s worth, it looks like the error message</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:8.5pt;font-family:Menlo;color:black">[proxy:0:1@node168.local] HYDU_sock_connect (utils/sock/sock.c:145): unable to connect from "node168.local" to "node100.local" (Connection refused)</span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:8.5pt;font-family:Menlo;color:black">[proxy:0:1@node168.local] main (pm/pmiserv/pmip.c:183): unable to connect to server node100.local at port 54762 (check for firewalls!)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">doesn’t show up immediately. It looks like it appears (if it appears) after the system has been hung up for a while.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Bruce</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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