Re: creating/listing RBD images on EC pool causes hang

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On Tue, Mar 06, 2018 at 09:43:36AM -0500, Wyllys Ingersoll wrote:
> Under Luminous 12.2.4 (with filestore OSDs), listing images on an
> erasure-coded pool results in the command hanging and never returning.
> 
> Ex:
> $ ceph osd pool create ectest 32 32 erasure default
> $ ceph osd pool create ectest-cache 32 32
> $ ceph osd tier add ectest ectest-cache
> $ ceph osd tier cache-mode ectest-cache writeback
> $ ceph osd tier set-overlay ectest ectest-cache
> $ ceph osd pool application enable ectest rbd
> $ rbd -p ectest ls
> ... (never returns )...
> 
> $ rbd create ectest/foobar --size 5G
> ... (never returns) ....

Are you sure your ec pool is in OK state? Could you please show `ceph -s`
(and `ceph health detail` if it is not OK)?

If the health is OK, what does happen if you try `rados -p ectest ls`?
If it hangs too, showing here the result of
`rados --debug-rados=30 -p ectest ls` might be useful.

-- 
Mykola Golub
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