How to fix the error ORA-00603: ORACLE server session terminated by fatal error?

In this post, you’ll learn more about the Oracle ErrorORA-00603: ORACLE server session terminated by fatal error with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-00603: ORACLE server session terminated by fatal error

Reason for the Error ORA-00603: ORACLE server session terminated by fatal error

An ORACLE server session was in an unrecoverable state.

How to fix the Error ORA-00603: ORACLE server session terminated by fatal error ?

You can fix this error in Oracle by following the below steps

Login to ORACLE again so a new server session will be created