As for now, when I run `dump_ops_in_flight`, `ops` in empty and `num_ops`
is 0.
But when I run `ceph status`, I still get 15 clients failing to respond to
cache pressure.

Where should I start solving this problem?

On Thu, Nov 10, 2016 at 6:16 PM Goncalo Borges <[email protected]>
wrote:

> Hi
>
> "ceph daemon mds.<id> session ls", executed in your mds server, should
> give you hostname and client id of all your cephfs clients.
>
> "ceph daemon mds.<id> dump_ops_in_flight" should give you operations not
> completed or pending to complete for certain clients ids. In case of
> problems, that those problematic clients will probably appear there.
>
> Cheers
> Goncalo
>
>
> ________________________________________
> From: ceph-users [[email protected]] on behalf of Yutian
> Li [[email protected]]
> Sent: 10 November 2016 15:21
> To: [email protected]
> Subject: [ceph-users] Locating CephFS clients in warn message
>
> I get a HEALTH_WARN when I run `ceph status`. It says
>
>      health HEALTH_WARN
>             mds0: Many clients (17) failing to respond to cache pressure
>
> I have 50 OSDs, 3 MONs, and 1 MDS. I just use CephFS and attach it to 20 ~
> 30 clients using kernel mount option.
>
> I wonder how to locate those "many" clients that are failing to respond. I
> don't even see an ID of the lagging clients anywhere.
>
> Thanks!
>
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