ora-27086 unable to lock file / Alertlog

Posted on January 13, 2013December 23, 2018 by Osama Mustafa in Database

ORA-27086:unable to lock file – already in use
Cause:the file is locked by another process, indicating that it is currently in use by a database instance.
Action:determine which database instance legitimately owns this file.

If you check the above Picture you will there’s two Pmon process for the same instance, So what you do is the follwing

export ORACLE_SID=swf33
export ORACLE_HOME=
sqlplus / as sysdba
Shutdown immediate;

After shutdown database another process still up use kill -9 OS command to kill it and startup database.

Thank you
Osama Mustafa

Published by Osama Mustafa

Osama considered as one of the leaders in Cloud technology, DevOps and database in the Middle-East. I have more than ten years of experience within the industry. moreover, certfied 4x AWS , 4x Azure and 6x OCI, have also obtained database certifications for multiple providers. In addition to having experience with Oracle database and Oracle products, such as middle-ware, OID, OAM and OIM, I have gained substantial knowledge with different databases. Currently, I am architecting and implementing Cloud and DevOps. On top of that, I'm providing solutions for companies that allow them to implement the solutions and to follow the best practices. View all posts by Osama Mustafa

2 thoughts on “ora-27086 unable to lock file / Alertlog”

Richy Richy says:

February 17, 2015 at 3:53 PM

I found so many interesting stuff in your blog especially its discussion. Serrurier d'Evry

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Amos Kihoro says:

March 30, 2017 at 12:14 PM

if you are experiencing nfs locks on the NetApp storage use the following linkhttps://wordpress.com/post/ora01157ora01110ora27086aftercrashpreventsdatabase.wordpress.com/17

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Published by Osama Mustafa

2 thoughts on “ora-27086 unable to lock file / Alertlog”

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