Ticket 7888

Summary:	unable to get pids of '(null)'
Product:	Slurm	Reporter:	Nate Rini <nate>
Component:	slurmstepd	Assignee:	Felip Moll <felip.moll>
Status:	RESOLVED FIXED	QA Contact:
Severity:	4 - Minor Issue
Priority:	---	CC:	felip.moll, nate
Version:	19.05.2
Hardware:	Linux
OS:	Linux
See Also:	https://bugs.schedmd.com/show_bug.cgi?id=7872 https://bugs.schedmd.com/show_bug.cgi?id=7839 https://bugs.schedmd.com/show_bug.cgi?id=6202 https://bugs.schedmd.com/show_bug.cgi?id=8656 https://bugs.schedmd.com/show_bug.cgi?id=9254
Site:	NOAA	Alineos Sites:	---
Atos/Eviden Sites:	---	Confidential Site:	---
Coreweave sites:	---	Cray Sites:	---
DS9 clusters:	---	HPCnow Sites:	---
HPE Sites:	---	IBM Sites:	---
NOAA SIte:	NESCC	OCF Sites:	---
Recursion Pharma Sites:	---	SFW Sites:	---
SNIC sites:	---	Linux Distro:	---
Machine Name:		CLE Version:
Version Fixed:	21.08.0	Target Release:	---
DevPrio:	---	Emory-Cloud Sites:	---

Description Nate Rini 2019-10-07 12:53:41 MDT

Splitting off this issue to new ticket from bug#7872 comment#21

Oct 07 17:33:44 h9c53 slurmstepd[22157]: debug2: _file_read_uint32s: unable to open '(null)/tasks' for reading : No such file or directory
Oct 07 17:33:44 h9c53 slurmstepd[22157]: debug2: xcgroup_get_pids: unable to get pids of '(null)'
Oct 07 17:33:44 h9c53 slurmstepd[22157]: debug2: _file_read_uint32s: unable to open '(null)/tasks' for reading : No such file or directory
Oct 07 17:33:44 h9c53 slurmstepd[22157]: debug2: xcgroup_get_pids: unable to get pids of '(null)'

Comment 10 Nate Rini 2020-06-05 10:39:49 MDT

Customer has same issue in Bug#9133 comment#59:

> _file_read_uint32s: unable to open '(null)/tasks' for reading : No such file or directory⏎
> xcgroup_get_pids: unable to get pids of '(null)'⏎
> _file_read_uint32s: unable to open '(null)/tasks' for reading : No such file or directory⏎
> xcgroup_get_pids: unable to get pids of '(null)'⏎
> task affinity plugin unloaded⏎
> _file_read_uint32s: unable to open '(null)/tasks' for reading : No such file or directory⏎
> xcgroup_get_pids: unable to get pids of '(null)'⏎

Comment 14 Felip Moll 2021-07-13 05:32:48 MDT

This issue is fixed in internal bug 9254 and the refactor of cgroup code that is now on master branch and will be in the next 21.08 release.

Thanks!