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<p class="MsoNormal">Hi Tarun,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We did find that there is a hardcoded limit of ~1000 command line arguments. If you want a temporary workaround, you can increase the value of this define in the MPICH source to something larger:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">#define HYD_NUM_TMP_STRINGS 1000<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I created <a href="https://github.com/pmodels/mpich/issues/6681">
https://github.com/pmodels/mpich/issues/6681</a> to track progress on a more robust fix.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Ken<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:12.0pt;color:black;mso-ligatures:none">From:
</span></b><span style="font-size:12.0pt;color:black;mso-ligatures:none">"Raffenetti, Ken via discuss" <discuss@mpich.org><br>
<b>Reply-To: </b>"discuss@mpich.org" <discuss@mpich.org><br>
<b>Date: </b>Monday, September 18, 2023 at 4:23 PM<br>
<b>To: </b>"discuss@mpich.org" <discuss@mpich.org>, "Thakur, Rajeev" <thakur@anl.gov><br>
<b>Cc: </b>"Raffenetti, Ken" <raffenet@anl.gov>, "kumar.tarun@siemens.com" <kumar.tarun@siemens.com><br>
<b>Subject: </b>Re: [mpich-discuss] Core dump in parse_args<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="mso-ligatures:none"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in">I’m not aware of a hard-coded limit, but I am able to reproduce a segfault reliably by passing 1000 arguments a toy executable. Will update with more info when we have it.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">Ken<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:1.0in"><b><span style="font-size:12.0pt;color:black;mso-ligatures:none">From:
</span></b><span style="font-size:12.0pt;color:black;mso-ligatures:none">"kumar.tarun--- via discuss" <discuss@mpich.org><br>
<b>Reply-To: </b>"discuss@mpich.org" <discuss@mpich.org><br>
<b>Date: </b>Friday, September 15, 2023 at 4:57 PM<br>
<b>To: </b>"Thakur, Rajeev" <thakur@anl.gov>, "discuss@mpich.org" <discuss@mpich.org><br>
<b>Cc: </b>"kumar.tarun@siemens.com" <kumar.tarun@siemens.com><br>
<b>Subject: </b>Re: [mpich-discuss] Core dump in parse_args<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:1.0in"><span style="mso-ligatures:none"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Thanks Rajeev for your reply.
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">I don’t have the exact number as of now. It’s definitely more than 1000. Is there a hard coded limit?<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Regards<br>
Tarun<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:1.0in"><b><span style="mso-ligatures:none">From:</span></b><span style="mso-ligatures:none"> Thakur, Rajeev <thakur@anl.gov>
<br>
<b>Sent:</b> Friday, September 15, 2023 2:40 PM<br>
<b>To:</b> discuss@mpich.org<br>
<b>Cc:</b> Kumar, Tarun (DI SW ICS DVT RD QSCE) <kumar.tarun@siemens.com><br>
<b>Subject:</b> Re: [mpich-discuss] Core dump in parse_args<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:1.0in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-family:"Lucida Grande",sans-serif">How many arguments?<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-family:"Lucida Grande",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-family:"Lucida Grande",sans-serif">Rajeev<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-family:"Lucida Grande",sans-serif"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="margin-left:1.0in"><b><span style="font-size:12.0pt;color:black;mso-ligatures:none">From:
</span></b><span style="font-size:12.0pt;color:black;mso-ligatures:none">"kumar.tarun--- via discuss" <<a href="mailto:discuss@mpich.org">discuss@mpich.org</a>><br>
<b>Reply-To: </b>"<a href="mailto:discuss@mpich.org">discuss@mpich.org</a>" <<a href="mailto:discuss@mpich.org">discuss@mpich.org</a>><br>
<b>Date: </b>Friday, September 15, 2023 at 4:22 PM<br>
<b>To: </b>"<a href="mailto:discuss@mpich.org">discuss@mpich.org</a>" <<a href="mailto:discuss@mpich.org">discuss@mpich.org</a>><br>
<b>Cc: </b>"<a href="mailto:kumar.tarun@siemens.com">kumar.tarun@siemens.com</a>" <<a href="mailto:kumar.tarun@siemens.com">kumar.tarun@siemens.com</a>><br>
<b>Subject: </b>[mpich-discuss] Core dump in parse_args<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:1.0in"><span style="mso-ligatures:none"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> I recently encountered this crash where mpiexec when executed from a bash script and with a large number of arguments crashes. The core dump is
as follows:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">#0 0x0000000000408ec3 in parse_args ()<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">#1 0x0000000000409f26 in HYD_uii_mpx_get_parameters ()<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">#2 0x000000000040397a in main ()<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">If I reduce the number of arguments then I don’t see the crash. Is it a known issue?<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Regards<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Tarun<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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