gluster 10.3: task glfs_fusenoti blocked for more than 120 seconds

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Good morning,

we've recently had some strange message in /var/log/syslog.

System:
debian bullseye, kernel 5.10.0-21-amd64 and 5.10.0-22-amd64
gluster 10.3

The message look like:

Apr 27 13:30:18 piggy kernel: [24287.715229] INFO: task
glfs_fusenoti:2787 blocked for more than 120 seconds.
Apr 27 13:30:18 piggy kernel: [24287.715327]       Not tainted
5.10.0-22-amd64 #1 Debian 5.10.178-3
Apr 27 13:30:18 piggy kernel: [24287.715419] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 27 13:30:18 piggy kernel: [24287.715575] task:glfs_fusenoti
state:D stack:    0 pid: 2787 ppid:     1 flags:0x00000000
Apr 27 13:30:18 piggy kernel: [24287.715734] Call Trace:
Apr 27 13:30:18 piggy kernel: [24287.715847]  __schedule+0x282/0x870
Apr 27 13:30:18 piggy kernel: [24287.715959]  schedule+0x46/0xb0
Apr 27 13:30:18 piggy kernel: [24287.716073]
rwsem_down_write_slowpath+0x257/0x4d0
Apr 27 13:30:18 piggy kernel: [24287.716194]
fuse_reverse_inval_entry+0x3b/0x1e0 [fuse]

etc. Full excerpt here: https://pastebin.com/6gDHgh16

This may cause our application to "hang". In the latest release i read
something about fuse:
https://docs.gluster.org/en/latest/release-notes/10.4/
"Fix fuse concurrency problems"

but i checked the tickets and wasn't able to find something.

However, i upgraded gluster client 10.3 -> 10.4, hoping that this
fixes the hang-issue.

Has anyone seen these messages before?


Best regards,
Hubert
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