Wednesday, December 4, 2013

ORA-27086: unable to lock file - already in use Netapp NFS

My 10.2 database crashed suddenly.
Can't login by # sqlplus / as sysdba
Can't shutdown it

I have to reboot the server.

Got error after OS is back:

Wed Dec 04 22:51:55 EST 2013
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/oracle_drives/oracle_sys/control01.ctl'
ORA-27086: unable to lock file - already in use
Linux-x86_64 Error: 11: Resource temporarily unavailable
Additional information: 8
Wed Dec 04 22:51:55 EST 2013
ORA-205 signalled during: ALTER DATABASE MOUNT...

This is a classic symptom of a Netapp problem, which likes to hold file locks open on NFS mounts.
There is a standard procedure for clearing those locks; see, for instance, document 429912.1 on Metalink.

ORA-01157 ORA-01110 ORA-27086 after crash prevents database from opening (Doc ID 429912.1)
Modified: 01-Mar-2013

As root on the NetApp, from the prompt:

priv set advanced
lock status -h
sm_mon -l
lock status -h

Thanks Team!!!
I am able to bring it back on line after that.

This Server changed the Hostname about 6 months ago.
The Netapp promtp still shows the old Hostname.
That could be the reason.


Please Notice part of the reference I don't agree with:
Do not copy control*.ctl files before you know what are you doing.
In my case, I did not touch any control or data file.
Only restart the Oracle instance several times.

Best Luck!


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