After patching to rhel 7.9, multipath status failed
Issue
Jun 16 16:07:04 hostxyz multipathd: LUNXYZ: sdl - readsector0 checker reports path is down
Jun 16 16:08:07 hostxyz multipathd: LUNXYZ: sdm - readsector0 checker reports path is down
Jun 16 16:09:39 hostxyz multipathd: LUNXYZ: sdag - readsector0 checker reports path is down
Also path status may shows fails
LUNXYZ (364817xyzabczx2356flk3w45872qw34f) dm-3 EQLOGIC ,100E-00
size=10T features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=enabled
|- 26:0:0:0 sdm 8:192 failed undef running
`- 27:0:0:0 sdda 70:128 failed undef running
Another symptom would be any multipath command may hang or take long time to return command output and the prompt. Which might associate with warning that multipath daemon is not running even though the status of the multipathd shows active and loaded/running
Jul 08 08:43:34 | multipath device maps are present, but 'multipathd' service is not running
Jul 08 08:43:34 | IO failover/failback will not work without 'multipathd' service running
systemctl status multipathd
● multipathd.service - Device-Mapper Multipath Device Controller
Loaded: loaded (/usr/lib/systemd/system/multipathd.service; enabled; vendor preset: enabled)
Active: active (running) (Result: exit-code) since Thu 2022-07-07 11:04:50 EDT; 21h ago
Process: 15909 ExecReload=/sbin/multipathd reconfigure (code=exited, status=1/FAILURE)
Process: 938 ExecStart=/sbin/multipathd (code=exited, status=0/SUCCESS)
Process: 929 ExecStartPre=/sbin/multipath -A (code=exited, status=0/SUCCESS)
Process: 922 ExecStartPre=/sbin/modprobe dm-multipath (code=exited, status=0/SUCCESS)
Main PID: 940 (multipathd)
CGroup: /system.slice/multipathd.service
└─940 /sbin/multipathd
Environment
- Red Hat Enterprise Linux
- Dell Equallogic Storage Array
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