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Don Burleson Blog 







ORA-03137: TTC protocol internal error

Oracle Database Tips by Donald BurlesonMay 16, 2016

Question: What causes the ORA-031237 error?

Errors in file /opt/oracle/diag/rdbms/trace/OMNIDB2_ora_2729.trc:
ORA-03137: TTC protocol internal error : [12333] [4] [195] [2]

Answer:  The oerr utility shows this for the ORA-03137 error:

ORA-03137 TTC protocol internal error: [%s] [%s] [%s] [%s] [%s] [%s] [%s] [%s]"

Cause:  TTC protocol internal error.

Action: Contact Oracle Support

As we see, there is an associated trace file and this file will have more information on the ORA-03137 error. 

This is usually a bug.

This is an internal error and you need to open a SR on MOSC.

In 11g, there is fix by upgrading to Oracle and a workaround by setting "_optim_peek_user_binds"=false.  Set this parameter ON LY with the consent of MOSC.

Solarwinds notes this on the ORA-03137

"Although upgrading to database version has been confirmed to have solved this issue in a high number of cases, error ORA-03137 [12333] accompanied by Protocol Violation messages may still occur intermittently in database versions prior to 11.2, including database and 

This has been reported in unpublished bug:8625762 ORA-3137 [12333] due to bind data not read from wire, in which case ORA-3137 [12333] can occur intermittently for SQL which uses user binds due to bind data being left unread on the Net connection.

The bug suggests the workaround of setting "_optim_peek_user_binds"=false to avoid this problem (workaround to be used with caution as it can affect execution plans chosen by CBO), and also provides the fix by the application of Patch:8625762"

MOSC References:

- ORA-600 [12333] / ORA-03137 [12333] Troubleshooting [ID 828123.1]

- NOTE:752297.1 - ORA-03137: TTC Protocol Internal Error : [12333] Using JDBC Driver

- NOTE:35928.1 - ORA-600 [12333] "Fatal Two-Task Protocol Violation"

- ORA-7445 [kxsOpenACursor()+1087] & ORA-03137 [12209] Errors [MOSC ID 1325759.1]

- MOSC patch 9703463 for ORA-03137.

- Bug #7445550 related to JDBC connections to the database.

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