[Gluster-users] Deleting large files on sharded volume hangs and doesn't delete shards

[Walter Deignan]

I have a reproducible issue where attempting to delete a file large enough 
to have been sharded hangs. I can't kill the 'rm' command and eventually 
am forced to reboot the client (which in this case is also part of the 
gluster cluster). After the node finishes rebooting I can see that while 
the file front-end is gone, the back-end shards are still present.

Is this a known issue? Any way to get around it?

----------------------------------------------

[root at dc-vihi19 ~]# gluster volume info gv0

Volume Name: gv0
Type: Tier
Volume ID: d42e366f-381d-4787-bcc5-cb6770cb7d58
Status: Started
Snapshot Count: 0
Number of Bricks: 24
Transport-type: tcp
Hot Tier :
Hot Tier Type : Distributed-Replicate
Number of Bricks: 4 x 2 = 8
Brick1: dc-vihi71:/gluster/bricks/brick4/data
Brick2: dc-vihi19:/gluster/bricks/brick4/data
Brick3: dc-vihi70:/gluster/bricks/brick4/data
Brick4: dc-vihi19:/gluster/bricks/brick3/data
Brick5: dc-vihi71:/gluster/bricks/brick3/data
Brick6: dc-vihi19:/gluster/bricks/brick2/data
Brick7: dc-vihi70:/gluster/bricks/brick3/data
Brick8: dc-vihi19:/gluster/bricks/brick1/data
Cold Tier:
Cold Tier Type : Distributed-Replicate
Number of Bricks: 8 x 2 = 16
Brick9: dc-vihi19:/gluster/bricks/brick5/data
Brick10: dc-vihi70:/gluster/bricks/brick1/data
Brick11: dc-vihi19:/gluster/bricks/brick6/data
Brick12: dc-vihi71:/gluster/bricks/brick1/data
Brick13: dc-vihi19:/gluster/bricks/brick7/data
Brick14: dc-vihi70:/gluster/bricks/brick2/data
Brick15: dc-vihi19:/gluster/bricks/brick8/data
Brick16: dc-vihi71:/gluster/bricks/brick2/data
Brick17: dc-vihi19:/gluster/bricks/brick9/data
Brick18: dc-vihi70:/gluster/bricks/brick5/data
Brick19: dc-vihi19:/gluster/bricks/brick10/data
Brick20: dc-vihi71:/gluster/bricks/brick5/data
Brick21: dc-vihi19:/gluster/bricks/brick11/data
Brick22: dc-vihi70:/gluster/bricks/brick6/data
Brick23: dc-vihi19:/gluster/bricks/brick12/data
Brick24: dc-vihi71:/gluster/bricks/brick6/data
Options Reconfigured:
nfs.disable: on
transport.address-family: inet
features.ctr-enabled: on
cluster.tier-mode: cache
features.shard: on
features.shard-block-size: 512MB
network.ping-timeout: 5
cluster.server-quorum-ratio: 51%

[root at dc-vihi19 temp]# ls -lh
total 26G
-rw-rw-rw-. 1 root root 31G May 17 10:38 win7.qcow2
[root at dc-vihi19 temp]# getfattr -n glusterfs.gfid.string win7.qcow2
# file: win7.qcow2
glusterfs.gfid.string="7f4a0fea-72c0-41e4-97a5-6297be0a9142"

[root at dc-vihi19 temp]# rm win7.qcow2
rm: remove regular file âwin7.qcow2â? y

*Process hangs and can't be killed. A reboot later...*

login as: root
Authenticating with public key "rsa-key-20170510"
Last login: Wed May 17 14:04:29 2017 from ******
[root at dc-vihi19 ~]# find /gluster/bricks -name 
"7f4a0fea-72c0-41e4-97a5-6297be0a9142*"
/gluster/bricks/brick1/data/.shard/7f4a0fea-72c0-41e4-97a5-6297be0a9142.23
/gluster/bricks/brick1/data/.shard/7f4a0fea-72c0-41e4-97a5-6297be0a9142.35
/gluster/bricks/brick2/data/.shard/7f4a0fea-72c0-41e4-97a5-6297be0a9142.52
/gluster/bricks/brick2/data/.shard/7f4a0fea-72c0-41e4-97a5-6297be0a9142.29
/gluster/bricks/brick2/data/.shard/7f4a0fea-72c0-41e4-97a5-6297be0a9142.22
/gluster/bricks/brick2/data/.shard/7f4a0fea-72c0-41e4-97a5-6297be0a9142.24

and so on...


-Walter Deignan
-Uline IT, Systems Architect
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