[Ocfs2-users] OCFS2 issues during high availability testing

Tue Jan 21 13:25:49 PST 2014

On 01/20/2014 11:05 PM, Thiruselvam Velayutham wrote:
>
> Dear Experts,
>
> Our DBA team is facing following problem.
>
> We did high availability testing and when we crash DB node 1, DB Node 
> 2 also went down, and from the errors, i could see ocfs2 service has 
> shutdown DB02
>
It appears the filesystem didn't go through a clean umount. In that case 
if the network resource goes down before the storage, then the other 
node thinks the network connection between the nodes broke. When that 
happens, they think it's a split brain and in a 2 node case, node with 
higher node number reboots.

To fix this, make sure you unmount ocfs2 volumes before doing a reboot.

PS: If the cluster setup has more than 2 nodes, this wouldn't be an 
issue, but still not a good idea to reboot the box without a clean umount.

> here is the issue in detail.
>
> DB01
>
> DB02
>
> Ap01
>
> AP02
>
> when i crash DB01 server, DB02 server also goes down and total oracle 
> is collapsed.
>
> when doing vice versa, crash DB02, DB01 survives . and oracle 
> continues to work without any issues
>
> messages_DB02.txt
>
> ===================
>
> Jan 20 13:15:52 kbmmoppdb02 avahi-daemon[8824]: Registering new 
> address record for 172.20.1.9 on eth0.
>
> Jan 20 13:16:13 kbmmoppdb02 kernel: o2dlm: Node 0 leaves domain 
> 8155F09482C94D3AB99D0669B91C0B1E
>
> Jan 20 13:16:13 kbmmoppdb02 kernel: o2dlm: Nodes in domain 
> 8155F09482C94D3AB99D0669B91C0B1E: 1
>
> Jan 20 13:17:27 kbmmoppdb02 kernel: o2net: connection to node 
> kbmmoppdb01 (num 0) at 10.255.255.3:7777 has been idle for 30.0 
> seconds, shutting it down.
>
> Jan 20 13:17:27 kbmmoppdb02 kernel: 
> (swapper,0,11):o2net_idle_timer:1515 here are some times that might 
> help debug the situation: (tmr 1390245417.409760 now 1390245447.410787 
> dr 1390245417.409740 adv 1390245417.409769:1390245417.409770 func 
> (d9d367e5:505) 1390245414.653885:1390245414.653892)
>
> Jan 20 13:17:27 kbmmoppdb02 kernel: o2net: no longer connected to node 
> kbmmoppdb01 (num 0) at 10.255.255.3:7777
>
> Jan 20 13:17:27 kbmmoppdb02 kernel: 
> (kswapd0,576,10):dlm_send_remote_unlock_request:360 ERROR: Error -112 
> when sending message 506 (key 0x60f827ee) to node 0
>
> Jan 20 13:17:48 kbmmoppdb02 kernel: o2net: connection to node 
> kbmmoppdb01 (num 0) at 10.255.255.3:7777 shutdown, state 7
>
> Jan 20 13:17:57 kbmmoppdb02 kernel: 
> (o2net,6123,11):o2net_connect_expired:1676 ERROR: no connection 
> established with node 0 after 30.0 seconds, giving up and returning 
> errors.
>
> Jan 20 13:17:57 kbmmoppdb02 kernel: 
> (dlm_thread,6161,8):dlm_drop_lockres_ref:2191 ERROR: Error -107 when 
> sending message 507 (key 0x60f827ee) to node 0
>
> Jan 20 13:17:57 kbmmoppdb02 kernel: 
> (kswapd0,576,10):dlm_send_remote_unlock_request:360 ERROR: Error -107 
> when sending message 506 (key 0x60f827ee) to node 0
>
> Jan 20 13:17:57 kbmmoppdb02 last message repeated 73 times
>
> Jan 20 13:17:57 kbmmoppdb02 kernel: 
> (dlm_thread,6161,8):dlm_purge_lockres:193 ERROR: 
> C5F98815D0BF43578B48C12C21114311: deref 
> O000000000000000124facd00000000 failed -107
>
> Jan 20 13:17:57 kbmmoppdb02 kernel: o2net: connection to node 
> kbmmoppdb01 (num 0) at 10.255.255.3:7777 shutdown, state 7
>
> Jan 20 13:18:25 kbmmoppdb02 last message repeated 9 times
>
> Jan 20 13:18:27 kbmmoppdb02 kernel: 
> (o2net,6123,11):o2net_connect_expired:1676 ERROR: no connection 
> established with node 0 after 30.0 seconds, giving up and returning 
> errors.
>
> Jan 20 13:18:27 kbmmoppdb02 kernel: 
> (dlm_thread,6161,8):dlm_drop_lockres_ref:2191 ERROR: Error -107 when 
> sending message 507 (key 0x60f827ee) to node 0
>
> Jan 20 13:18:27 kbmmoppdb02 kernel: 
> (kswapd0,576,10):dlm_send_remote_unlock_request:360 ERROR: Error -107 
> when sending message 506 (key 0x60f827ee) to node 0
>
> Jan 20 13:18:27 kbmmoppdb02 last message repeated 180 times
>
> Jan 20 13:18:27 kbmmoppdb02 kernel: 
> (dlm_thread,6161,8):dlm_purge_lockres:193 ERROR: 
> C5F98815D0BF43578B48C12C21114311: deref 
> M000000000000000124facd00000000 failed -107
>
> Jan 20 13:18:27 kbmmoppdb02 kernel: 
> (dlm_thread,6161,10):dlm_drop_lockres_ref:2191 ERROR: Error -107 when 
> sending message 507 (key 0x60f827ee) to node 0
>
> Jan 20 13:18:27 kbmmoppdb02 kernel: 
> (dlm_thread,6161,10):dlm_purge_lockres:193 ERROR: 
> C5F98815D0BF43578B48C12C21114311: deref 
> O000000000000000124facc00000000 failed -107
>
> Jan 20 13:18:27 kbmmoppdb02 kernel: 
> (dlm_thread,6161,4):dlm_drop_lockres_ref:2191 ERROR: Error -107 when 
> sending message 507 (key 0x60f827ee) to node 0
>
> Jan 20 13:18:27 kbmmoppdb02 kernel: 
> (dlm_thread,6161,4):dlm_purge_lockres:193 ERROR: 
> C5F98815D0BF43578B48C12C21114311: deref 
> O000000000000000124fa8e00000000 failed -107
>
> Jan 20 13:18:28 kbmmoppdb02 kernel: o2net: connection to node 
> kbmmoppdb01 (num 0) at 10.255.255.3:7777 shutdown, state 7
>
> Jan 20 13:18:31 kbmmoppdb02 kernel: o2net: connection to node 
> kbmmoppdb01 (num 0) at 10.255.255.3:7777 shutdown, state 7
>
> Jan 20 13:18:33 kbmmoppdb02 kernel: 
> (events/11,49,11):o2quo_make_decision:158 ERROR: fencing this node 
> because it is connected to a half-quorum of 1 out of 2 nodes which 
> doesn't include the lowest active node 0
>
> Jan 20 13:18:33 kbmmoppdb02 kernel: 
> (events/11,49,11):o2hb_stop_all_regions:2026 ERROR: stopping heartbeat 
> on all active regions.
>
> Jan 20 13:23:10 kbmmoppdb02 syslogd 1.4.1: restart.
>
> Jan 20 13:23:10 kbmmoppdb02 kernel: klogd 1.4.1, log source = 
> /proc/kmsg started
>
> Regards,
>
> Thiruselvam V
>
> Description: Description: Description: cid:image001.png at 01CE5876.CAF7DD70
>
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>
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