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Shared server connections hang after installing CPUJAN2006 (Doc ID 361273.1)

Last updated on JUNE 11, 2019

Applies to:

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


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. 


Shared Server connections hang after installing the CPUJAN2006 patch.


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