<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div dir="ltr"><div class="markdown-here-wrapper" style=""><p style="margin:1.2em 0px!important">When you pass <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;display:inline">-disable-auto-cleanup</code> on the command line to mpiexec, you’re telling Hydra not to clean up other processes when one process in your job fails. It’s assumed that those processes will either clean themselves up or complete successfully.</p>
<p style="margin:1.2em 0px!important">It’s not clear to me what your program is trying to do that would be erroneous, but usually when a process crashes, it’s the result of an erroneous program rather than a bug in MPICH. I’m not saying that there’s no bugs in MPICH, but we’d like to be able to narrow down where to look.</p>
<p style="margin:1.2em 0px!important">Thanks,<br>Wesley</p>
<div title="MDH:V2hlbiB5b3UgcGFzcyBgLWRpc2FibGUtYXV0by1jbGVhbnVwYCBvbiB0aGUgY29tbWFuZCBsaW5l
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bSBub3Qgc2F5aW5nIHRoYXQgdGhlcmUncyBubyBidWdzIGluIE1QSUNILCBidXQgd2UnZCBsaWtl
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L2Rpdj48ZGl2PlRoYW5rcyw8L2Rpdj48ZGl2Pldlc2xleTwvZGl2Pg==" style="height:0;font-size:0em;padding:0;margin:0"></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 1, 2015 at 6:35 AM, Anatoly G <span dir="ltr"><<a href="mailto:anatolyrishon@gmail.com" target="_blank">anatolyrishon@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div dir="ltr">
<div>Dear <span>MPICH</span>.</div>
<div>I have an additional information.</div>
<div>This "strange configuration" (hydra connected to computer not from the list) is result of
<span>unhandled</span> Main process fail (similar to abort() call) without killing children process (hydra). </div>
<div>Thus I can see "<span>init"</span> process becomes a father of hydra process. </div>
<div>Can you please refer me to document explaining hydra behavior when father process is dead (an emergency situation).</div>
<div>I understand that this situation shouldn't happen and this bug will be fixed, but I'm curious about the hydra logic.</div>
<div><br>
</div>
<div>Regards,</div>
<div><span>Anatoly</span>.</div>
<br>
<div class="gmail_quote">---------- Forwarded message ----------<br>
From: <b class="gmail_sendername"><span>Anatoly</span> G</b>
<span dir="ltr"><<span>anatolyrishon</span>@<a href="http://gmail.com" target="_blank">gmail.com</a>></span><br>
Date: Wed, Dec 24, 2014 at 1:00 PM<br>
Subject: <span>mpiexec</span>.hydra creates <span>
unexpectable</span> <span>TCP</span> socket.<br>
To: discuss@<span>mpich</span>.org<br>
<br>
<br>
<div dir="ltr">Dear <span><span>MPICH</span></span>.
<div>I'm using <span><span>mpich</span></span> 3.1 (hydra+<span><span>MPI</span></span>).</div>
<div>I execute main application (Main) which calls <span><span>mpiexec</span></span>.hydra in following way:</div>
<div><br>
</div>
<div><span><span>mpiexec</span></span>.hydra -<span><span>genvall</span></span> -disable-auto-cleanup -f
<span><span>MpiConfigMachines</span></span>.<span><span>txt</span></span> -launcher=ssh -n 3
<span><span>MPI</span></span>_<span><span>Prog</span></span> <br>
</div>
<div><br>
</div>
<div><span><span>MpiConfigMachines</span></span>.<span><span>txt</span></span> content:<br>
</div>
<div>
<div><a href="http://10.3.2.100:1" target="_blank">10.3.2.100:1</a></div>
<div><a href="http://10.3.2.101:2" target="_blank">10.3.2.101:2</a></div>
</div>
<div><br>
</div>
<div>Where 10.3.2.100 is a local host.</div>
<div>As result I get</div>
<div>
<ul>
<li>Main + single <span><span>MPI</span></span>_<span><span>Prog</span></span> processes on local computer<br>
</li><li>2 <span><span>MPI</span></span>_<span><span>Prog</span></span> processes on remote one.</li></ul>
<div>Main application establish <span><span>TCP</span></span> socket with local
<span><span>MPI</span></span>_<span><span>Prog</span></span>.</div>
</div>
<div>Main application establish <span><span>TCP</span></span> socket with controller on other computer 10.3.2.170, which is not included in
<span><span>MpiConfigMachines</span></span>.<span><span>txt</span></span> file.</div>
<div><br>
</div>
<div>After executing some time (hours, sometimes days) I see via <span><span>netstat</span></span> that created new connection from
<span><span>mpiexec</span></span>.hydra and controller. </div>
<div><br>
</div>
<div>Before executing <span><span>mpiexec</span></span>.hydra I set environment variable</div>
<div>
<p class="MsoNormal"><span><span>setenv</span></span>
<span><span>MPIEXEC</span></span>_PORT_RANGE 50010:65535</p>
<p class="MsoNormal">According to manual this variable limits hydra destination ports to [50010:65535].</p>
<p class="MsoNormal"><br>
</p>
<p class="MsoNormal">I see that hydra uses these ports with <span><span>MPI</span></span>_<span><span>Prog</span></span>, but connection with controller done on port 701 (controller computer).</p>
<p class="MsoNormal"><br>
</p>
<p class="MsoNormal">Controller program is a server. It can accept connections only.<br>
</p>
<p class="MsoNormal"><br>
</p>
<p class="MsoNormal">Can you please advice how to stand with this problem?</p>
<p class="MsoNormal">How hydra recognizes controller <span><span>IP</span></span> and establish connection with it?</p>
<p class="MsoNormal"><br>
</p>
<p class="MsoNormal">Sincerely,</p>
<p class="MsoNormal"><span><span>Anatoly</span></span>.</p>
</div>
<div><br>
</div>
</div>
</div>
<br>
</div>
</div>
</blockquote></div><br></div>