ORA-01102: cannot mount database in EXCLUSIVE mode

Posted on by Osama Mustafa in Database
Error happened when try open database :

SQL> startup
ORACLE instance started.

Total System Global Area 267227136 bytes
Fixed Size 2212496 bytes
Variable Size 205524336 bytes
Database Buffers 54525952 bytes
Redo Buffers 4964352 bytes
ORA-01102: cannot mount database in EXCLUSIVE mode

 In alert.log

sculkget: lock held by PID: 12359
ORA-09968: unable to lock file
Linux-x86_64 Error: 11: Resource temporarily unavailable
Additional information: 12359
ORA-1102 signalled during: ALTER DATABASE MOUNT…

On OS level :

[oracle@localhost trace]$ ps -ef | grep pmon

oracle 10222 1 0 10:27 ? 00:00:00 ora_pmon_ORCL
oracle 2522 1 0 Nov09 ? 00:00:06 ora_pmon_orcl

Use :

 Kill -9 10222 2522

Then
1-After that fire export ORACLE_SID= (watch case sensitive )
2-sqlplus / as sysdba
3-startup ;

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.

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