Dear Cephalopodians, we just had a "lockup" of many MDS requests, and also trimming fell behind, for over 2 days. One of the clients (all ceph-fuse 12.2.5 on CentOS 7.5) was in status "currently failed to authpin local pins". Metadata pool usage did grow by 10 GB in those 2 days.
Rebooting the node to force a client eviction solved the issue, and now
metadata usage is down again, and all stuck requests were processed quickly.
Is there any idea on what could cause something like that? On the client, der
was no CPU load, but many processes waiting for cephfs to respond.
Syslog did yield anything. It only affected one user and his user directory.
If there are no ideas: How can I collect good debug information in case this
happens again?
Cheers,
Oliver
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