How to fix the Oracle error ORA-12826: hung parallel query server was killed?

In this post, you’ll learn more about the Oracle ErrorORA-12826: hung parallel query server was killed with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12826: hung parallel query server was killed

Reason for the Error ORA-12826: hung parallel query server was killed

parallel query server was hung and subsequently killed.

How to fix the Error ORA-12826: hung parallel query server was killed ?

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

re-execute query and report suspicious events in trace file to Oracle Support Services if error persists.