Re: [nautilus] ceph tell hanging

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Hi,

> However as soon as we issue either of the above tell commands, it just
> hangs. Furthermore when ceph tell hangs, pg are also becoming stuck in
> "Activating" and "Peering" states.
> 
> It seems to be related, as soon as we stop ceph tell (ctrl-c it), a few
> minutes later the pgs are peered/active.
> 
> We can reproduce this problem also with very busy osds, which have been
> moved to another host - they also do not react to the ceph tell commands.

Does this also happen when you issue a osd specific "tell", i.e. ceph
tell osd.13 injectargs '--osd-max-backfills 4'

Does this also happen when you loop over it one by one?

> Did anyone see this before and/or do you have a hint on how to debug
> ceph tell as it is not a daemon on its own?

IIRC I have seen this, but not in combination with PGs peering /
activating. Has the config change become effective on alls OSDs: verify
with  ceph daemon osd.13 config get osd_max_backfills (for all OSDs)

Gr. Stefan
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