I recently set up scheduled snapshots on my CephFS filesystem, and ever since the cluster has been intermittently going into HEALTH_WARN with an MDS_CLIENT_LATE_RELEASE notification.
Specifically:
[WARN] MDS_CLIENT_LATE_RELEASE: 1 clients failing to respond to capability release
mds.[redacted](mds.0): Client [redacted] failing to respond to capability release client_id: 806270628
I catch errors like this in the logs:
client.785155718 isn't responding to mclientcaps(revoke), ino 0x10004c1abc6 pending pAsLsXsFsc issued pAsLsXsFsc, sent 3844.269321 seconds ago
(Ignore the fact that the client numbers don't match in this case; one was captured before the client was rebooted, the other after. There's only one CephFS client and the numbers normally match.)
If left alone, the issue eventually resolves itself, then comes back at some point in the future.
It appears to be the same as this bug: https://tracker.ceph.com/issues/49434
Which leads here: https://tracker.ceph.com/issues/57244
And then this pull request: https://github.com/ceph/ceph/pull/47752
My reading is that this is simply a matter of the MDS not recognizing that the caps have, in fact, been released, and that I can safely ignore the warnings until the patch percolates down to a Pacific release. Is that right, or am I missing something significant?
-----
Edward Huyer
Golisano College of Computing and Information Sciences
Rochester Institute of Technology
Golisano 70-2373
152 Lomb Memorial Drive
Rochester, NY 14623
585-475-6651
erhvks@xxxxxxx<mailto:erhvks@xxxxxxx>
Obligatory Legalese:
The information transmitted, including attachments, is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and destroy any copies of this information.
_______________________________________________
ceph-users mailing list -- ceph-users@xxxxxxx
To unsubscribe send an email to ceph-users-leave@xxxxxxx
