Tuesday, July 7, 2020

ORA-03137: TTC protocol internal error

Error:
 : [3147] [] [] [] [] [] [] []

Reason
This error is only telling us that the client and server process communication was terminated due to some "event".

Client / server message exchanges use an Oracle specific protocol (TTC). ORA-3137 is reported if something unexpected is seen that does not conform to the expected protocol. The error can be raised by the client or server side of a connection.

Cause 
Oracle database 10g
Oracle ManagedDll 19c

Workaround:

alter system set "_optim_peek_user_binds"=false;

Restart instance and listener services

Solution
Upgrade database to minimum 11g

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