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<p class="MsoNormal"><b>IBM Spectrum Scale : Node crashes after upgrading to V5.1.2+ with msgqueue enabled
<o:p></o:p></b></p>
<p class="MsoNormal"><a href="https://www.ibm.com/support/pages/node/6824149?myns=s033&mynp=OCSTXKQY&mync=E&cm_sp=s033-_-OCSTXKQY-_-E">https://www.ibm.com/support/pages/node/6824149?myns=s033&mynp=OCSTXKQY&mync=E&cm_sp=s033-_-OCSTXKQY-_-E</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">says:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt;background:#F8F8F8"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;mso-fareast-language:EN-GB">A node crash can occur due to resource exhaustion after upgrading to <b>V5.1.2.0</b> or
higher with msgqueue enabled. This affects all upgraded nodes until the filesystem version is moved to <b>V5.1.2.0+</b> (<i>mmchfs -V</i>) <b><i>and </i></b>the migration off msgqueue occurs (<i>mmmsgqueue config --remove-msgqueue</i>).<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;mso-fareast-language:EN-GB">My emphasis on <b><i>and</i></b>. But also says:<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;background:#F8F8F8"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;mso-fareast-language:EN-GB">This issue will affect all versions mentioned above until <b><i>msgqueue</i> </b>is disabled
across the cluster.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;background:white"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#1D1C1D;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="color:#1D1C1D;mso-fareast-language:EN-GB">So it's not entirely clear whether you have to just update client version, update the filesystem version or disable msgqueue or do all 3 to fix it...<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><o:p> </o:p></p>
<p class="MsoNormal">Can an IBMer clarify?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Luke<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#1F497D;mso-fareast-language:EN-GB">--
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#1F497D;mso-fareast-language:EN-GB">Luke Sudbery<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#1F497D;mso-fareast-language:EN-GB">Principal Engineer (HPC and Storage).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#1F497D;mso-fareast-language:EN-GB">Architecture, Infrastructure and Systems<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#1F497D;mso-fareast-language:EN-GB">Advanced Research Computing, IT Services<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#1F497D;mso-fareast-language:EN-GB">Room 132, Computer Centre G5, Elms Road<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#1F497D;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;color:#1F497D;mso-fareast-language:EN-GB">Please note I don’t work on Monday.<o:p></o:p></span></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
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