Shared server connections hang after installing CPUJAN2006

(Doc ID 361273.1)

Last updated on OCTOBER 12, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.5 to 9.2.0.5 [Release 9.2]
Information in this document applies to any platform.

Symptoms

Checked for relevance on 7-Mar-2013.

Connections via dispatchers hang.

 

For each failed connection via dispatcher, the listener will log three errors in the listener log as shown.

TNS-12518: TNS:listener could not hand off client connection
TNS-12560: TNS:protocol adapter error
TNS-530: Protocol adapter error

For each failed connection attempt, the number of "refused connections", shown with lsnrctl services, will increment by 1. 

Changes

Shared Server connections hang after installing the CPUJAN2006 patch.

Cause

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