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</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link="#0563C1" vlink="#954F72" style='text-justify-trim:punctuation'><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi, all:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Recently we found some strange log in slurmctld.log about node not responding, such as:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:10.692] error: Nodes node[128-168,170-178] not responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:58.098] Node node171 now responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:58.099] Node node165 now responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:58.099] Node node163 now responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:58.099] Node node172 now responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:58.099] Node node170 now responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:58.099] Node node175 now responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:58.099] Node node164 now responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:58.099] Node node178 now responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2022-07-09T03:23:58.099] Node node177 now responding<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Meanwhile, checking slurmd.log and nhc.log on those node all seem to be ok at the reported timepoint.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>So we guess it’s slurmctld launch some detection towards those compute node and didn’t get response, thus lead to slurmctld thinking those node to be not responding.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Then the question is what detect action do slurmctld launched? How did it determine whether a node is responsive or non-responsive?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>And is it possible to customize slurmctld’s behavior on such detection, for example wait timeout or retry count before determine the node to be not responding?<o:p></o:p></span></p></div></body></html>