[Bugs] [Bug 1406411] Add-brick command fails when one of the replica brick is down

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1406411



--- Comment #4 from Mohit Agrawal <moagrawa at redhat.com> ---
Hi,

It seems it is expected behavior.As per current dht code in first attempt
layout sets only when all subvolumes 
are up otherwise it will not set layout and throws error.

Below is the case of plain distributed environment when i have killed one brick
after start volume then mount is failing as per current dht behavior

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

[root at dhcp10-210 ~]# systemctl restart glusterd.service
[root at dhcp10-210 ~]# gluster v create test 10.65.7.254:/dist1/brick1
10.65.7.254:/dist2/brick2
volume create: test: success: please start the volume to access data
[root at dhcp10-210 ~]# gluster v start test
volume start: test: success
[root at dhcp10-210 ~]# gluster v status
Status of volume: test
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick 10.65.7.254:/dist1/brick1             49152     0          Y       11117
Brick 10.65.7.254:/dist2/brick2             49153     0          Y       11136

Task Status of Volume test
------------------------------------------------------------------------------
There are no active volume tasks

[root at dhcp10-210 ~]# kill 11136
[root at dhcp10-210 ~]# mount -t glusterfs 10.65.7.254:/test /mnt
Mount failed. Please check the log file for more detail

[2016-12-26 06:11:14.871167] W [MSGID: 109005]
[dht-selfheal.c:2102:dht_selfheal_directory] 0-test-dht: Directory selfheal
failed: 1 subvolumes down.Not fixing. path = /, gfid = 
[2016-12-26 06:11:14.880232] W [fuse-bridge.c:767:fuse_attr_cbk]
0-glusterfs-fuse: 2: LOOKUP() / => -1 (Stale file handle)

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

As of now we think it is a corner case , it would be difficult to provide a fix
unless there is any data loss in this case.


Regards
Mohit Agrawal

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