[Gluster-users] Glusterfs :sync lost between two boards

[songxin]

Hi, 

I use glusterfs (version 3.7.6) in replicate mode for sync between two boards in a node.

When one of the board is locked and replaced with new board and restarted we see that sync is lost between the two boards.The mounted glusterfs volume is not present on the replaced board. 

Output of some of gluster commands on the replaced board are as below.

002500> gluster volume status c_glusterfs 
Status of volume: c_glusterfs 
Gluster process TCP Port RDMA Port Online Pid 
------------------------------------------------------------------------------ 
Brick 192.32.0.48:/opt/lvmdir/c2/brick 49240 0 Y 1293 

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



002500> gluster volume info 

Volume Name: c_glusterfs 
Type: Distribute 
Volume ID: 3625f7ff-2b92-4ac4-9967-7abf966eceef 
Status: Started 
Number of Bricks: 1 
Transport-type: tcp 
Bricks: 
Brick1: 192.32.0.48:/opt/lvmdir/c2/brick 
Options Reconfigured: 
performance.readdir-ahead: on 
network.ping-timeout: 4 
nfs.disable: on 



In status info , we don't see the gluster process of the replaced board. The gluster process Brick 192.32.0.48:/opt/lvmdir/c2/brick is of the other board which is not replaced , 

Output of the commands on the other board are : 


# gluster volume info 

Volume Name: c_glusterfs 
Type: Distribute 
Volume ID: 3625f7ff-2b92-4ac4-9967-7abf966eceef 
Status: Started 
Number of Bricks: 1 
Transport-type: tcp 
Bricks: 
Brick1: 192.32.0.48:/opt/lvmdir/c2/brick 
Options Reconfigured: 
performance.readdir-ahead: on 
network.ping-timeout: 4 
nfs.disable: on 

# gluster peer status 
Number of Peers: 2 

Hostname: 192.32.1.144 
Uuid: bbe2a458-ad3d-406d-b233-b6027c12174e 
State: Peer in Cluster (Connected) 

Hostname: 192.32.1.144 
Uuid: bbe2a458-ad3d-406d-b233-b6027c12174e 
State: Peer in Cluster (Connected) 

gluster peer status shows the same host twice , the gluster process of same is missing in the volume info, Also , the command gluster volume status c_glusterfs hangs 

From the logs of gluster at /var/log/glusterfs , we observed some errors 

cmd_history.log : 
volume add-brick c_glusterfs replica 2 192.32.1.144:/opt/lvmdir/c2/brick force : FAILED : Locking failed on 192.32.1.144. Please check log file for details. 
cli.log: 
[2016-01-30 04:32:40.179381] I [cli.c:721:main] 0-cli: Started running gluster with version 3.7.6 
[2016-01-30 04:32:40.191715] I [MSGID: 101190] [event-epoll.c:632:event_dispatch_epoll_worker] 0-epoll: Started thread with index 1 
[2016-01-30 04:32:40.193246] I [socket.c:2355:socket_event_handler] 0-transport: disconnecting now 
[2016-01-30 04:32:40.196551] I [cli-rpc-ops.c:2465:gf_cli_add_brick_cbk] 0-cli: Received resp to add brick 
[2016-01-30 04:32:40.196684] I [input.c:36:cli_batch] 0-: Exiting with: -1 



Can any one help me to analyze the reason？


Thanks，
Xin 
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