ORA-12528 TNS:listener: all appropriate instances are blocking new connections
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-12528 from Oracle 10g ?
All instances supporting the service requested by the client reported that they were blocking the new connections. This condition may be temporary, such as at instance startup.
How to deal with ORA-12528 from Oracle 10g ?
Attempt the connection again. If error persists, then contact the administrator to check the status of the instances.
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-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-12524 TNS:listener could not resolve HANDLER_NAME given in connect descriptor
- 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-12529 TNS:connect request rejected based on current filtering rules
- ORA-12531 TNS:cannot allocate memory
- ORA-12532 TNS:invalid argument
- ORA-12533 TNS:illegal ADDRESS parameters
- ORA-12534 TNS:operation not supported
- ORA-12535 TNS:operation timed out
- ORA-12536 TNS:operation would block