In this post, you’ll learn more about the Oracle ErrorORA-12803: parallel query server lost contact with another server with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-12803: parallel query server lost contact with another server
Reason for the Error ORA-12803: parallel query server lost contact with another server
A parallel query server lost contact with another server.
How to fix the Error ORA-12803: parallel query server lost contact with another server ?
You can fix this error in Oracle by following the below steps
Check your system for anomalies and reissue the statement. If this error persists, contact Oracle Support Services.