ORA-03135: connection lost contact
The ORA-03135 error is common when
1) Server unexpectedly terminated or was forced to terminate.
2) Server timed out the connection.
1) Check if the server session was terminated.
2) Check if the timeout parameters are set properly in
In my Case i set these 2 parameters in the SQLNET.ora file ($ORACLE_HOME/network/admin/sqlnet.ora) & issue was resolved.
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Reference–: (Doc ID 787354.1)–ORA-3135 Connection Lost Contact
Mustapha Abubakar · May 15, 2021 at 2:31 pm
For me i set the inbound parameter to 180 and that resolved my issue.