Hi Xiubo.

> ... I am more interested in the kclient side logs. Just want to
> know why that oldest request got stuck so long.

I'm afraid I'm a bad admin in this case. I don't have logs from the host any 
more, I would have needed the output of dmesg and this is gone. In case it 
happens again I will try to pull the info out.

The tracker https://tracker.ceph.com/issues/22885 sounds a lot more violent 
than our situation. We had no problems with the MDSes, the cache didn't grow 
and the relevant one was also not put into read-only mode. It was just this 
warning showing all the time, health was OK otherwise. I think the warning was 
there for at least 16h before I failed the MDS.

The MDS log contains nothing, this is the only line mentioning this client:

2023-07-20T00:22:05.518+0200 7fe13df59700  0 log_channel(cluster) log [WRN] : 
client.145678382 does not advance its oldest_client_tid (16121616), 100000 
completed requests recorded in session

Best regards,
=================
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
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