ORA-01102: cannot mount database in exclusive mode

I got ” ORA-01102: cannot mount database in exclusive mode ”  error in Oracle database.

 

ORA-01102: cannot mount database in exclusive mode

 

Details of error are as follows.

ORA-01102 cannot mount database in EXCLUSIVE mode

Cause: Some other instance has the database mounted exclusive or shared.
Action: Shut down the other instance or mount in a compatible mode.

SQL> alter database mount;
alter database mount
*
ERROR at line 1:
ORA-01102: cannot mount database in EXCLUSIVE mode
SQL>


    

 

 

cannot mount database in EXCLUSIVE mode

This ORA-01102 errors are related with the Some other instance has the database mounted exclusive or shared.

Shut down the other instance or mount in a compatible mode.

Firstly shutdown instance using the shutdown immediate command.

 

Then kill ALL Oracle process using the following script.

[[email protected] ~]$ kill -9 `ps -ef | grep $ORACLE_SID | grep -v grep | awk '{print $2}'`

 

Now run startup mount again.

SQL> startup mount;
ORACLE instance started.

Total System Global Area 895105620 bytes
Fixed Size 2022504 bytes
Variable Size 163578776 bytes
Database Buffers 415236096 bytes
Redo Buffers 6365184 bytes
Database mounted.


SQL> alter database open;

Database altered

 

If you use Oracle RAC, then set cluster_database parameter to true and run it again as follows.

alter system set cluster_database=TRUE scope=spfile sid='*';
shutdown immediate;
srvctl start database -d DB_NAME


Do you want to learn Oracle Database for Beginners, then read the following articles.

Oracle Tutorial | Oracle Database Tutorials for Beginners ( Junior Oracle DBA )

 

 1 views last month,  1 views today

About Mehmet Salih Deveci

I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks.I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients.If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress [email protected].-                                                                                                                                                                                                                                                 -Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  [email protected] a mail atabilirsiniz.

Leave a Reply

IT Tutorial