MGW_AGENT: mgw extproc connections fail with ORA-12537 and TNS-12518 reported in Listener log
Last updated on FEBRUARY 16, 2018
Applies to:
Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.2.0.1 [Release 12.1 to 12.2]Oracle Net Services - Version 12.1.0.2 to 12.2.0.1 [Release 12.1 to 12.2]
Information in this document applies to any platform.
Symptoms
Running an Oracle Messaging Gateway Agent (mgw_agent) out of a 12.1.0.2 Database.
Using an Oracle Grid structure but single (standalone).
Upgrade was done for the GRID Home 12.1.0.2 to 12.2.0.1 but not the Database or Listener.
Tnsnames.ora file contains:
Changes
This was triggered by the GRID being upgraded from 12.1.0.2 to 12.2.0.1 but not the Database Home.
Cause
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