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I have a handful of OpenSuSE 11.2 servers that utilize OCFS2 volumes. I've noticed that o2cb can't figure out when the OCFS2 cluster is actually mounted. For example, when I try to shutdown o2cb, after stopping OCSF2, o2cb refuses to shutdown because it thinks OCFS2 is still up!

After stopping OCFS2 I try to stop o2cb...

hamguy:/dev/disk/by-label # /etc/init.d/o2cb stop
Stopping O2CB cluster ocfs2: Failed
Unable to stop cluster as heartbeat region still active

So I check the status...

hamguy:/dev/disk/by-label # /etc/init.d/o2cb status
Driver for "configfs": Loaded
Filesystem "configfs": Mounted
Stack glue driver: Loaded
Stack plugin "o2cb": Loaded
Driver for "ocfs2_dlmfs": Loaded
Filesystem "ocfs2_dlmfs": Mounted
Checking O2CB cluster ocfs2: Online
Heartbeat dead threshold = 31
Network idle timeout: 30000
Network keepalive delay: 2000
Network reconnect delay: 2000
Checking O2CB heartbeat: Active

And double check OCFS2...

hamguy:/dev/disk/by-label # /etc/init.d/ocfs2 status
Configured OCFS2 mountpoints:  /u/conf /u/logs /u/backup /u/client /u/data /u/mdata

OCFS2 is clearly down, while o2cb clearly thinks otherwise.

The versions of OCFS2 and o2cb are...

kendall@hamguy:~> rpm -qa |grep ocfs2

kendall@hamguy:~> rpm -qa |grep o2cb

What causes this, and is there a way around it? If I try to reboot the machine, it will just sit there forever until your physically power cycle it. That obviously is a bit of a problem.

Any insight is appreciated, thank you.


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Just to verify, does mount | grep ocfs and cat /proc/mounts | grep ocfs indicate that the OS thinks anything is mounted via ocfs? And what OCFS processes are still showing from ps -ef | grep ocfs? – Christopher Karel Apr 27 '11 at 19:24
I'll try to check that as well, tonight, when I can do it without impacting service. I know I checked 'mount |grep ocfs2' but I didn't copy the output and don't remember what it said. – Kendall Apr 27 '11 at 19:30
umount -l /dev/device 
/etc/init.d/o2cb offline ocfs2

make sure that Checking O2CB heartbeat: is INACTIVE when you do /etc/init.d/o2cb status

if is doesnt change to INACTIVE then remove all its entries from /etc/fstab and reboot.

Check status again after reboot , if it is INACTIVE then unload and re-enable the nodes using:

/etc/init.d/o2cb unload
/etc/init.d/o2cb enable

POINT is the nodes must all be in INACTIVE state before joinging them all to the same heartbeat


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