ORA-12524 TNS:listener could not resolve HANDLER_NAME given in connect descriptor
This is an Oracle Database Server Message. This can be generated by the Oracle Database when running any Oracle program.
What is the cause of ORA-12524 from Oracle 10g ?
The HANDLER_NAME in the CONNECT_DATA was not found in the listener's tables for the specified SERVICE_NAME and INSTANCE_NAME.
How to deal with ORA-12524 from Oracle 10g ?
Check to make sure that the HANDLER_NAME specified is correct.
Contacting Oracle support services ?
Some messages recommend contacting Oracle Support Services to report a problem. Please go here for more information : Oracle Support.
Linked Error Messages
- ORA-12516 TNS:listener could not find available handler with matching protocol stack
- ORA-12518 TNS:listener could not hand off client connection
- ORA-12519 TNS:no appropriate service handler found
- ORA-12520 TNS:listener could not find available handler for requested type of server
- ORA-12521 TNS:listener does not currently know of instance requested in connect descriptor
- ORA-12522 TNS:listener could not find available instance with given INSTANCE_ROLE
- ORA-12523 TNS:listener could not find instance appropriate for the client connection
- ORA-12525 TNS:listener has not received client's request in time allowed
- ORA-12526 TNS:listener: all appropriate instances are in restricted mode
- ORA-12527 TNS:listener: all instances are in restricted mode or blocking new connections
- ORA-12528 TNS:listener: all appropriate instances are blocking new connections
- ORA-12529 TNS:connect request rejected based on current filtering rules
- ORA-12531 TNS:cannot allocate memory
- ORA-12532 TNS:invalid argument