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Dispatchers Fail to Register Dynamically Against the Listener (Doc ID 889092.1)

Last updated on JANUARY 26, 2016

Applies to:

Oracle Net Services - Version: to
This problem can occur on any platform.
This document applies to versions 10g and newer.


Dispatchers are spawning but failing to register against the listener following this command:

ALTER SYSTEM SET DISPATCHERS='(address=(protocol=tcp)(host=myserver))(dispatchers=2)' scope=both sid='instance_name'; 

Additionally, the "alter system register" command has no effect.

Lsnrctl services output does not show any dispatchers have been registerered. However, a check of ps -ef | grep D000 shows that dispatcher processes have spawned.

The listener is running on the default port of 1521 and LOCAL_LISTENER and REMOTE_LISTENER are set correctly.


This is a new implementation of shared server.  This database has previously been running in dedicated server mode.


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