Memory leak in "sbd: watcher: Pacemaker" process

This document (000021642) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise High Availability Extension 15 SP6

SUSE Linux Enterprise Server for SAP Applications 15 SP6

Situation

The memory consumption of the "sbd: watcher: Pacemaker" process increases over time and uses up all the server's memory.
This memory leak issue was reproduced after upgrading to SLES15 SP6 using pacemaker version 2.1.7+20231219.0f7f88312-150600.6.3.1.

Resolution

This issue is already reported to Engineering and is currently working on a fix.

If a patch is required, please open a Support Case to request for a PTF.

Cause

A regression bug was introduced in the pacemaker for SLES15 SP6 HAE.

Status

Reported to Engineering

Additional Information

The following commands can be used to confirm the existence of the memory leak in the "sbd: watcher: Pacemaker" process:

# date ; ps -C sbd -o user,pid,ppid,%cpu,%mem,vsz,rss,stat,time,cmd
Thu Nov 21 10:48:34 +08 2024
USER        PID   PPID %CPU %MEM    VSZ   RSS STAT     TIME CMD
root      30293      1  0.0  1.2  35044 20664 SL   00:00:00 sbd: inquisitor
root      30295  30293  0.0  1.2  35080 20600 SL   00:00:00 sbd: watcher: /dev/disk/by-path/pci-0000:00:10.0-scsi-0:0:1:0 - slot: 0 - uuid: 721e8eac-7155-408d-8610-42807529
root      30296  30293  0.0  1.6  40936 26324 SL   00:00:00 sbd: watcher: Pacemaker
root      30297  30293  0.0  2.6  57516 42236 SL   00:00:00 sbd: watcher: Cluster

After waiting for some time, run the same command again:

# date ; ps -C sbd -o user,pid,ppid,%cpu,%mem,vsz,rss,stat,time,cmd
Thu Nov 21 13:14:28 +08 2024
USER        PID   PPID %CPU %MEM    VSZ   RSS STAT     TIME CMD
root      30293      1  0.0  1.2  35044 20664 SL   00:00:01 sbd: inquisitor
root      30295  30293  0.0  1.2  35080 20600 SL   00:00:02 sbd: watcher: /dev/disk/by-path/pci-0000:00:10.0-scsi-0:0:1:0 - slot: 0 - uuid: 721e8eac-7155-408d-8610-42807529
root      30296  30293  0.0  2.5  55448 40788 SL   00:00:05 sbd: watcher: Pacemaker
root      30297  30293  0.0  2.6  57516 42236 SL   00:00:02 sbd: watcher: Cluster

The output shows that the memory consumption (%MEM, VSZ & RSS) of the "sbd: watcher: Pacemaker" process increases after running for some time.

Disclaimer

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Document ID:000021642
Creation Date: 11-Dec-2024
Modified Date:11-Dec-2024
- SUSE Linux Enterprise High Availability Extension
- SUSE Linux Enterprise Server for SAP Applications

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