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DBLINK: ORA-03113, ORA-12571 Issuing a Select Over a Database Link Through a Firewall (Doc ID 1507098.1)

Last updated on AUGUST 16, 2018

Applies to:

Oracle Net Services - Version 10.2.0.1 to 12.2.0.1 [Release 10.2 to 12.2]
Information in this document applies to any platform.

Symptoms

Intermittently receiving the below error while doing a select over the dblink

ORA-03113: end-of-file on communication channel
ORA-12571: TNS:packet writer failure

Changes

Database is recently moved to different network or firewall rules are changed recently.

Cause

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