ORA-39078: unable to dequeue message for agent [string] from queue "[string]"

Cause: The Data Pump''s communication layer was unable to retrieve a message from the control or status queue. Subsequent messages will detail the problem.

Action: Fix the problem if possible, or contact Oracle Customer Support.

Error Type: ORA

• Additional information for ORA-39078: unable to dequeue message for agent [string] from queue "[string]"39078
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