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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">After a restart this morning*, slurmctl is starting but then failing before it is up and running:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="Code"><span style="color:black">slurmctld: debug2: user user1 default acct is account1</span><o:p></o:p></p>
<p class="Code"><span style="color:black">slurmctld: debug2: assoc 68939(account1, user2) has direct parent of 26369(account1, (null))</span><o:p></o:p></p>
<p class="Code"><span style="color:black">slurmctld: debug2: user user2 default acct is account1</span><o:p></o:p></p>
<p class="Code"><span style="color:black">slurmctld: debug2: assoc 26396(account1, user3) has direct parent of 26369(account1, (null))</span><o:p></o:p></p>
<p class="Code"><span style="color:black">slurmctld: debug2: user user3 default acct is account1</span><o:p></o:p></p>
<p class="Code"><span style="color:black">slurmctld: debug2: assoc 26390(account1, user4) has direct parent of 26369(account1, (null))</span><o:p></o:p></p>
<p class="Code"><span style="color:black">slurmctld: debug2: user user4 default acct is account1</span><o:p></o:p></p>
<p class="Code"><span style="color:black">slurmctld: debug2: assoc 26342(account2, (null)) has direct parent of 3(root, (null))</span><o:p></o:p></p>
<p class="Code"><span style="color:black">slurmctld: debug2: assoc 76299(account2, rq-worker) has direct parent of 26342(account2, (null))</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Segmentation fault (core dumped)</span><o:p></o:p></p>
<p class="Code"><span style="color:black">[root@bb-er-slurm01 state]#</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Which give us very little to go on.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Earlier, there was a long list of <o:p></o:p></p>
<p class="Code"><span style="color:black;mso-fareast-language:EN-GB">slurmctld: error: assoc 62346 doesn't have access to it's default qos 'qos1'</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="Code"><span style="color:black;mso-fareast-language:EN-GB">slurmctld: error: assoc 61271 doesn't have access to it's default qos 'qos1'</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="Code"><span style="color:black;mso-fareast-language:EN-GB">slurmctld: error: assoc 61221 doesn't have access to it's default qos 'qos1'</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="Code"><span style="color:black;mso-fareast-language:EN-GB">slurmctld: error: assoc 61215 doesn't have access to it's default qos 'qos1’</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Shortly before the segfault. We have cleared those, by setting correct default qos with sacctmgr, but the controller is still seg faulting.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">*The restart was initiated by our HA cluster (pacemaker/corosync) and at one point 2 copies of slurmdbd may have been running. But the second copy appeared to detect this and back off? Not sure:<o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:47 bb-aw-slurm01.bear.cluster systemd[1]: Started Cluster Controlled slurmdbd.</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:47 bb-aw-slurm01.bear.cluster slurmdbd[212307]: debug: Log file re-opened</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:47 bb-aw-slurm01.bear.cluster slurmdbd[212307]: pidfile not locked, assuming no running daemon</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:47 bb-aw-slurm01.bear.cluster slurmdbd[212307]: debug: auth/munge: init: Munge authentication plugin loaded</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:52 bb-aw-slurm01.bear.cluster slurmdbd[212307]: accounting_storage/as_mysql: _check_mysql_concat_is_sane: MySQL server version is: 10.3.32-MariaDB</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:52 bb-aw-slurm01.bear.cluster slurmdbd[212307]: error: _mysql_query_internal: deadlock detected attempt 1/10: 1213 WSREP replication failed. Check your wsrep connection state and retry the query.</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:52 bb-aw-slurm01.bear.cluster slurmdbd[212307]: error: mysql_query failed: 1047 WSREP has not yet prepared node for application use</span><o:p></o:p></p>
<p class="Code"><span style="color:black"> create table if not exists table_defs_table (creation_time int unsigned not null, mod_time int unsigned default 0 not null, table_name text not null,</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:52 bb-aw-slurm01.bear.cluster slurmdbd[212307]: accounting_storage/as_mysql: init: Accounting storage MYSQL plugin failed</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:52 bb-aw-slurm01.bear.cluster slurmdbd[212307]: error: Couldn't load specified plugin name for accounting_storage/mysql: Plugin init() callback failed</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:52 bb-aw-slurm01.bear.cluster slurmdbd[212307]: error: cannot create accounting_storage context for accounting_storage/mysql</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:52 bb-aw-slurm01.bear.cluster systemd[1]: slurmdbd.service: main process exited, code=exited, status=1/FAILURE</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:52 bb-aw-slurm01.bear.cluster systemd[1]: Unit slurmdbd.service entered failed state.</span><o:p></o:p></p>
<p class="Code"><span style="color:black">Jul 07 09:06:52 bb-aw-slurm01.bear.cluster systemd[1]: slurmdbd.service failed.</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But either way, we suspect database corruption may be the problem, but slurmdbd logs don’t give anything to go on.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So questions,<o:p></o:p></p>
<ol style="margin-top:0cm" start="1" type="a">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">How can we troubleshoot further? I am currently attempting to rebuild slurm with debugging symbols (<a href="https://slurm.schedmd.com/faq.html#debug">https://slurm.schedmd.com/faq.html#debug</a>)
as gdb is not giving any useful information at all ATM.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">What are the implications of restoring the database? How does slurm reconcile the database and the state directory?<o:p></o:p></li></ol>
<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"><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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