Hi all,
We had a stuck mds ops this morning on a 14.2.11 cephfs cluster. I
tried to ls the path from another client and that blocked.
The ops were like this:
# egrep 'desc|flag|age' ops.txt
"description": "client_request(client.1212755100:37475
lookup #0x1003e229d38/analytics-logs 2020-09-03 04:30:45.607640
caller_uid=2004, caller_gid=2004{})",
"age": 4975.7069706660004,
"flag_point": "failed to authpin, subtree is being exported",
"description": "client_request(client.1212755100:37477
lookup #0x1003e229d38/bundled-plugins 2020-09-03 04:31:01.064591
caller_uid=2004, caller_gid=2004{})",
"age": 4960.2499044630003,
"flag_point": "failed to authpin, subtree is being exported",
...
The full list of stuck ops is at https://termbin.com/8itv
We had only just yesterday enabled 2 active mds's on this cluster.
I don't have much info about this client, other than that it has been
running for several weeks successfully until we enabled the 2nd active
mds.
To clear out the slow ops we evicted client.1212755100, and then we
reduced back to 1 active mds so it doesn't happen again.
Any ideas what might have triggered this?
Cheers, Dan
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