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Dedicated Connection Requests Failing With ORA-12519: TNS: No Appropriate Service Handler Found (Doc ID 373428.1)

Last updated on MARCH 31, 2022

Applies to:

Oracle Net Services - Version to [Release 9.2 to 12.2]
Information in this document applies to any platform.


The problem occurs when the listener is configured with a VIP address, the pfile setting for DB_NAME is different from the value for SID specified in the connect string, listener.ora has a static handler, and shared server is configured.  Under these circumstances, when a dedicated connection request is made, the request would fail with an ORA-12519:  TNS: No appropriate service handler found


The pfile setting for DB_NAME is different from the SID specified in the client's tnsnames.ora file and the listener is configured with VIP address.   Also, the client will likely have the (SERVER=DEDICATED) clause in their tns connect string that demands they bypass the registered handlers for DISPATCHERS.


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