Last updated on OCTOBER 12, 2016
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [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.
Sign In with your My Oracle Support account
Don't have a My Oracle Support account? Click to get started
Million Knowledge Articles and hundreds of Community platforms