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LSNRCTL Commands Intermittently With Error "TNS-12537: TNS:connection Closed" (Doc ID 2541572.1)

Last updated on JANUARY 28, 2020

Applies to:

Oracle Net Services - Version 10.2.0.4 to 11.2.0.4 [Release 10.2 to 11.2]
Information in this document applies to any platform.

Symptoms

LSNRCTL status or services is intermittently failing to return a response and shows the following error stack:

Connecting to (ADDRESS=(PROTOCOL=TCP)(Host=hostname)(Port=1671))
TNS-12537: TNS:connection closed
TNS-12560: TNS:protocol adapter error
 TNS-00507: Connection closed
 
There is no apparent pattern to this behavior.  Sometimes the LSNRCTL utility will respond to a status command.
 


Changes

 This may be a new installation or a recent implementation of TCP.VALIDNODE_CHECKING.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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