All errors › ORA errors
ORA-03113: End-of-file on communication channel
What it means
The connection to the server process was broken: the server process died (check for ORA-00600/07445 in the alert log), a firewall dropped an idle connection, or the instance went down.
How to fix it
Check the alert log and trace files for the time of the error; for idle drops configure SQLNET.EXPIRE_TIME / keepalive.
Catch it before it runs
ORA Error Helper
Explains ORA-/PLS- codes inside JetBrains IDEs and DataGrip. PL/SQL Lint
Flags risky PL/SQL patterns while you type. Oracle Plan Reader
Reads execution plans and points at the slow step. PL/SQL in Practice
Kindle book with practical PL/SQL for working developers.
Explains ORA-/PLS- codes inside JetBrains IDEs and DataGrip. PL/SQL Lint
Flags risky PL/SQL patterns while you type. Oracle Plan Reader
Reads execution plans and points at the slow step. PL/SQL in Practice
Kindle book with practical PL/SQL for working developers.
Nearby errors
Updated 2026-11-12.