In this post, you’ll learn more about the Oracle ErrorORA-03135: connection lost contact with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-03135: connection lost contact
Reason for the Error ORA-03135: connection lost contact
1) Server unexpectedly terminated or was forced to terminate. 2) Server timed out the connection.
How to fix the Error ORA-03135: connection lost contact ?
You can fix this error in Oracle by following the below steps
1) Check if the server session was terminated. 2) Check if the timeout parameters are set properly in sqlnet.ora.