[Ocfs2-users] re: o2hb_write_timeout:270 ERROR: Heartbeat write timeout

[Peter Santos]

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Folks,
	
I'm trying to piece together what happened during a recent event where our 3 node RAC cluster had problems.
It appears that all 3 nodes restarted .. which is likely to occur if all 3 nodes cannot communicate with the
shared ocfs2 storage.

I did find out from our SA, that this happened during the time he was replacing a failed drive on the storage
and the storage was in a degraded mode.  I'm trying to understand if the 3 nodes had a difficult time accessing
the shared ocfs2 volume or was it a tcp connectivity issue. There is nobody currently using the cluster ..so
it should have been idle from a user perspective.


prompt># cat /etc/fstab | grep ocfs2

/dev/sdb1  /ocfs2       ocfs2      _netdev,datavolume,nointr  0 0
/dev/sdb2  /backups     ocfs2      _netdev,datavolume,nointr  0 0

we have 2 ocfs2 volumes.. once if for the voting and ocr files, while the other is to be used as a
shared storage for backups of archivelog files etc.


/var/log/messages


NODE1 (dbo1)
========================================================================================================
Nov 15 17:12:49 dbo1 kernel: (13,3):o2hb_write_timeout:270 ERROR: Heartbeat write timeout to device sdb2
				    after 12000 milliseconds
Nov 15 17:12:49 dbo1 kernel: Heartbeat thread (13) printing last 24 blocking operations (cur = 13):
Nov 16 05:44:58 dbo1 syslogd 1.4.1: restart.


NODE2 (dbo2)
========================================================================================================

Nov 15 17:12:57 dbo2 kernel: o2net: connection to node dbo1 (num 0) at 192.168.134.140:7777 has been idle for 10
seconds, shutting it down.
Nov 15 17:12:57 dbo2 kernel: (0,1):o2net_idle_timer:1310 here are some times that might help debug the situation: (tmr
1163628767.826089 now 1163628777.825614 dr 1163628767.826070 adv 1163628767.826104:1163628767.826105 func (f0735f96
   :506) 1163454320.893701:1163454320.893708)
Nov 15 17:12:57 dbo2 kernel: o2net: no longer connected to node dbo1 (num 0) at 192.168.134.140:7777
Nov 15 17:12:59 dbo2 kernel: o2net: connection to node dbo3 (num 2) at 192.168.134.142:7777 has been idle for 10
seconds, shutting it down.
Nov 15 17:12:59 dbo2 kernel: (0,1):o2net_idle_timer:1310 here are some times that might help debug the situation: (tmr
1163628769.44144 now 1163628779.43640 dr 1163628769.44123 adv 1163628769.44159:1163628769.44160 func (f7e0383f:504)
    1163540424.444236:1163540424.444248)
Nov 15 17:12:59 dbo2 kernel: o2net: no longer connected to node dbo3 (num 2) at 192.168.134.142:7777
Nov 15 17:32:37 dbo2 -- MARK --
Nov 15 17:33:03 dbo2 kernel: (11,1):o2quo_make_decision:121 ERROR: fencing this node because it is only connected to 1
nodes and 2 is needed to make a quorum out of 3 heartbeating nodes
Nov 15 17:33:03 dbo2 kernel: (11,1):o2hb_stop_all_regions:1889 ERROR: stopping heartbeat on all active regions.
Nov 15 17:33:03 dbo2 kernel: Kernel panic: ocfs2 is very sorry to be fencing this system by panicing
Nov 15 17:33:03 dbo2 kernel:

NODE3 (dbo3)
========================================================================================================
Nov 15 17:12:49 dbo3 kernel: (13,3):o2hb_write_timeout:270 ERROR: Heartbeat write timeout to device sdb2
				    after 12000 milliseconds
Nov 15 17:12:49 dbo3 kernel: Heartbeat thread (13) printing last 24 blocking operations (cur = 11):
Nov 16 10:45:32 dbo3 syslogd 1.4.1: restart.


any help is greatly appreciated (BTW, I've read the ocfs2 user guide).

thanks
- -peter

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