Listener Log Intermittently Reports: <unknown connect data> and either * 12537 or * 12569 errors (Doc ID 1664901.1)

Last updated on JUNE 21, 2017

Applies to:

Oracle Net Services - Version 11.2.0.3 to 11.2.0.3 [Release 11.2]
Oracle Database - Enterprise Edition - Version 11.2.0.4 to 11.2.0.4 [Release 11.2]
Oracle Net Services - Version 11.2.0.4 to 12.1.0.2 [Release 11.2 to 12.1]
Information in this document applies to any platform.

Goal

Intermittently, or repeatedly, the listener log contains messages such as:

 

Solution

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