TNS-12502 Error Thrown Repeatedly in Listener Log (Doc ID 422931.1)

Last updated on NOVEMBER 20, 2016

Applies to:

Oracle Net Services - Version 9.2.0.8 to 11.2.0.4 [Release 9.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 6-JUL-2016***

Symptoms

Entries like the following appear regularly in the listener log:

TNS-12502: TNS:listener received no CONNECT_DATA from client

Cause

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