Oracle® Database 8i | 9i | 10g | 11g | 12c | 18c | 19c Error Codes

Information for Database Error Code ORA-12516: TNS:listener could not find available handler with matching protocol stack
Oracle® Database Error ORA-1251612/14

ORA-12516: TNS:listener could not find available handler with matching protocol stack

Cause: None of the known and available service handlers for the given SERVICE_NAME support the client''s protocol stack: transport, session, and presentation protocols.

Action: Check to make sure that the service handlers (e.g. dispatchers) for the given SERVICE_NAME are registered with the listener, are accepting connections, and that they are properly configured to support the desired protocols.

Error Type: ORA

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