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Queries That Access a Local Synonym Which Points to a Remote Database Error With ORA-03106 or ORA-03020 Two-Task Errors (Doc ID 416857.1)

Last updated on OCTOBER 23, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 9.2 to 10.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.


After applying an interim patch to an Oracle Home on a Unix or Linux server, a query that had previously worked begins failing with:

ORA-03106 "fatal two-task communication protocol error" and / or
ORA-03120 "two-task conversion routine: integer overflow" errors.

The query selects from a local synonym, which in turn selects from a remote table via a database link.


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