Shared server connections hang after installing CPUJAN2006
(Doc ID 361273.1)
Last updated on JUNE 01, 2018
Applies to:Oracle Database - Enterprise Edition - Version 22.214.171.124 to 126.96.36.199 [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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