In this post, you’ll learn more about the Oracle ErrorTNS-01159: Internal connection limit has been reached; listener has shut down with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
TNS-01159: Internal connection limit has been reached; listener has shut down
Reason for the Error TNS-01159: Internal connection limit has been reached; listener has shut down
Cause: The internal Oracle Net connection list is full. The listener is configured to use too many Oracle Net connections.
How to fix the Error TNS-01159: Internal connection limit has been reached; listener has shut down ?
You can fix this error in Oracle by following the below steps
Action: Reduce the number of listen addresses or services connected to the listener. For further details, turn on tracing and reexecute the operation. If error persists, contact Oracle Customer Support.