[Gluster-users] Cannot remove-brick/migrate data

[Jarsulic, Michael [CRI]]

I am having issues with one of my systems that houses two bricks and want to bring it down for maintenance. I was able to remove the first brick successfully and committed the changes. The second brick is giving me a lot of problems with the rebalance when I try to remove it. It seems like it is stuck somewhere in that process:

# gluster volume remove-brick hpcscratch cri16fs002-ib:/data/brick4/scratch status
                                    Node Rebalanced-files          size       scanned      failures       skipped               status   run time in secs
                               ---------      -----------   -----------   -----------   -----------   -----------         ------------     --------------
                               localhost                0        0Bytes           522             0             0          in progress             915.00


The rebalance logs show the following error message.

[2017-03-08 17:48:19.329934] I [MSGID: 109081] [dht-common.c:3810:dht_setxattr] 0-hpcscratch-dht: fixing the layout of /userx/Ethiopian_imputation
[2017-03-08 17:48:19.329960] I [MSGID: 109045] [dht-selfheal.c:1509:dht_fix_layout_of_directory] 0-hpcscratch-dht: subvolume 0 (hpcscratch-client-0): 45778954 chunks
[2017-03-08 17:48:19.329968] I [MSGID: 109045] [dht-selfheal.c:1509:dht_fix_layout_of_directory] 0-hpcscratch-dht: subvolume 1 (hpcscratch-client-1): 45778954 chunks
[2017-03-08 17:48:19.329974] I [MSGID: 109045] [dht-selfheal.c:1509:dht_fix_layout_of_directory] 0-hpcscratch-dht: subvolume 2 (hpcscratch-client-4): 45778954 chunks
[2017-03-08 17:48:19.329979] I [MSGID: 109045] [dht-selfheal.c:1509:dht_fix_layout_of_directory] 0-hpcscratch-dht: subvolume 3 (hpcscratch-client-5): 45778954 chunks
[2017-03-08 17:48:19.329983] I [MSGID: 109045] [dht-selfheal.c:1509:dht_fix_layout_of_directory] 0-hpcscratch-dht: subvolume 4 (hpcscratch-client-7): 45778954 chunks
[2017-03-08 17:48:19.400394] I [MSGID: 109036] [dht-common.c:7869:dht_log_new_layout_for_dir_selfheal] 0-hpcscratch-dht: Setting layout of /userx/Ethiopian_imputation with [Subvol_name: hpcscratch-client-0, Err: -1 , Start: 1052915942 , Stop: 2105831883 , Hash: 1 ], [Subvol_name: hpcscratch-client-1, Err: -1 , Start: 3158747826 , Stop: 4294967295 , Hash: 1 ], [Subvol_name: hpcscratch-client-4, Err: -1 , Start: 0 , Stop: 1052915941 , Hash: 1 ], [Subvol_name: hpcscratch-client-5, Err: -1 , Start: 2105831884 , Stop: 3158747825 , Hash: 1 ], [Subvol_name: hpcscratch-client-7, Err: 22 , Start: 0 , Stop: 0 , Hash: 0 ],
[2017-03-08 17:48:19.480882] I [dht-rebalance.c:2446:gf_defrag_process_dir] 0-hpcscratch-dht: migrate data called on /userx/Ethiopian_imputation


Any suggestions on how I can get this brick out of play and preserve the data?

--
Mike Jarsulic
Sr. HPC Administrator
Center for Research Informatics | University of Chicago
773.702.2066