rbd delete operation hangs, ops blocked

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Hi,

I had recent problem with flapping hdd and in result I need to delete
broken rbd.
Problem is all operations towards this rbd stuck. I even cannot delete
rbd - it sits on 6% done and I found this line in one of osds logs:
2015-06-06 08:03:31.770812 7fe5002c2700  0 log_channel(default) log
[WRN] : slow request 30720.717642 seconds old, received at 2015-06-05
23:31:31.032740: osd_op(client.2457394.0:8430
rbd_data.18b3c2ae8944a.00000000000020e5 [delete] 4.fac8e26
ack+ondisk+write+known_if_redirected e136905) currently reached_pg

How can I remove broken rbd? Fast way would be desirable, but any way
will do that eventually helps to delete that rbd.

Ugis
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