On Wed, Oct 02, 2019 at 10:24:41PM +0800, "Yan, Zheng" <ukernel@xxxxxxxxx> wrote: > Can you reproduce this. If you can, run 'ceph daemon mds.x session ls' > before restart mds. I just managed to run into this issue again. 'ceph daemon mds.x session ls' doesn't work because apparently our setup doesn't have the admin socket in the expected place. I've therefore used 'ceph tell mds.0 session ls' which I think should be the same expect for how the daemon is contacted. When the issue happens and 2 clients are hanging, 'ceph tell mds.0 session ls' shows only 9 clients instead of 11. The hanging clients are missing from the list. Once they are rebooted they show up in the output. On a potentially interesting note: The clients that were hanging this time are the same ones as last time. They aren't set up any differently from the others as far as I can tell though. Florian
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