Growing number of deleted file handles in SUSE Manager may lead to taskomatic outage

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Environment

SUSE Manager Server 4.3
SUSE Manager Server 4.3.1
SUSE Manager Server 4.3.2

Situation

Running e.g. lsof may take a considerable amount of time on SUSE Manager 4.3, 4.3.1 and 4.3.2 installations which is due to a high amount of remaining file handles of deleted JAVA processes. In certain circumstances this may lead to a malfunctioning taskomatic process and affect the availability of SUSE Manager Server.

Resolution

As the SUSE Manager 4.3.2. release contains a fix addressing the issue reported in "TID 00020800 - SUSE Manager webUI freezes, not accessible or times out with 4.3.1 update ", hence it is recommended to update to 4.3.2 first and make sure to apply the patch SUSE-SLE-Module-SUSE-Manager-Server-4.3-2022-3945. This is usually achieved automatically if zypper patch is executed without additional arguments.

If other patches were applied at the same time, a system reboot is recommended.

Additional Information

To check the number of deleted JAVA file handles please use:

date;lsof | grep -i delete | grep <pid-of-taskomatic-java-process> | wc -l

Example output:

suma:~ # date;lsof | grep -i delete | grep 7339 | wc -l
Tue Oct 25 09:08:46 CEST 2022
977897

Disclaimer

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