You could add (debug) logs for starters ;-)
There was a thread [1] describing something quite similar, pointing to
this bug report [2]. In recent versions it's supposed to be fixed
although I don't see the tracker or PR number in the release notes of
both pacific and quincy. Can you verify if you're hitting the same bug?
Thanks,
Eugen
[1]
https://lists.ceph.io/hyperkitty/list/ceph-users@ceph.io/thread/KPVJSA5WHO7USULV4TCUJBDDMF5CA6HX/#365K4RJ56NORJTSYPLXDLQBB3EQNYC6V
[2] https://tracker.ceph.com/issues/49132
Zitat von Nathan Harper <nathhar...@gmail.com>:
Hi,
We're having sporadic problems with a CephFS filesystem where MDSs end up
on the OSD blocklist. We're still digging around looking for a cause
(Ceph related or other infrastructure cause).
The cluster isn't massive (68 OSDs spread over 34 hosts), each host is a
VM, with MGR/MON/MDS on non-OSD hosts.
Running Ceph 16.2.10
Any suggestions for debugging this further?
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