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Bug 17890099: After upgrade to; receiving Error ORA-02072: Distributed Database Network Protocol Mismatch (Doc ID 1671956.1)

Last updated on SEPTEMBER 16, 2020

Applies to:

Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database - Enterprise Edition - Version to [Release 11.2]
Oracle Database - Personal Edition - Version to [Release 11.2]
Oracle Database - Standard Edition - Version to [Release 11.2]
Information in this document applies to any platform.


In a distributed environment, if one of the databases was upgraded to and there are other databases which are at version lower than which are accessed over dblink then the DML over dblink may fail with below error:

ERROR at line 1:
ORA-02072: distributed database network protocol mismatch
ORA-02063: preceding line from <DB Link>


 Upgrade of one of the databases in distributed environment to


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