Created attachment 1154727 [details]
renaming snap crash

Description of problem:
Seeing both rbd rename and rbd bench write crash when executed in parallel

Version-Release number of selected component (if applicable):
10.2.0-1

How reproducible:
Once

Steps to Reproduce:
1. Create an RBD Image.
rbd image 'testing2':
        size 102400 MB in 25600 objects
        order 22 (4096 kB objects)
        block_name_prefix: rbd_data.10af238e1f29
        format: 2
        features: layering, exclusive-lock, object-map, fast-diff, deep-flatten, journaling
        flags: 
        journal: 10af238e1f29
        mirroring state: disabled

2. Create 100 Snapshot.
3. Rename all snapshot
for i in {1..100}; do rbd snap rename None/testing2@snappy$i None/testing2@snap$i; done
4. rbd bench-write -p None --image testing2 --io-size 10240 --io-pattern rand


Run both step 3 and 4 in parallel.


Actual results:
Both starting execution, but after a while both "rbd snap rename" and "rbd bench-write" crashed (PFA)


Expected results:
There should not be any crash.

PFA, both logs (bench-write.log and renaming_snap.log)