ORA-03113: end-of-file on communication channel

Hi,

Sometimes You can get “ORA-03113: end-of-file on communication channel” error.

Details of error are as follows.

ORA-03113: end-of-file on communication channel

Cause: The connection between Client and Server process was broken.

Action: There was accommunication error that requires further investigation. First, check for network problems and review the SQL*Net setup. Also, look in the alert.log file for any errors. Finally, test to see whether the server process is dead and whether a trace file was generated at failure time.

ORA-01041 internal error. hostdef extension doesn't exist
ORA-03114 not connected to ORACLE
ORA-01012 not logged on

SQL> startup

ORACLE instance started.

Total System Global Area 2488635392 bytes

Fixed Size 2215904 bytes

Variable Size 1879048224 bytes

Database Buffers 587202560 bytes

Redo Buffers 20168704 bytes

ORA-03113: end-of-file on communication channel

Process ID: 26459

Session ID: 191 Serial number: 1

SQL>

If you got this error during the Startup as above, this type of ORA-03113 error is internal Oracle error like ORA-00600. If it is internal Oracle error, you should shutdown database with immediate option and check the alertlog, What are the alertlog errors related with this error.

If you got this error from Oracle clients like TOAD, SQL Developer, PL-SQL Developer or Applications, this type of ORA-03113 error is related with Network issues, so you need to check and fix your Network or VPN problems.

When Server or Operating system crashed, you can also see ORA-03113: end-of-file on communication channel errors in the Alertlog.

Or Sometimes Server Processes ( SMON, PMON, ARCHn, DBWR and etc.. ) are killed at Operating system, you can see ORA-03113: end-of-file on communication channel errors in the Alertlog.

If this error is related with internal Oracle error and you couldn’t solve it with restart of database, then you need to create a Service Request ( SR ) to Oracle, probably this is a Oracle bug, and Oracle provides you one of patch or Patchset update for this.

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

https://ittutorial.org/oracle-database-19c-tutorials-for-beginners/