The Network Adapter could not establish the connection.
Customer is experiencing a problem with some database jobs, connecting to an Oracle 12 database, randomly failing because of the following error:
AWKDBE009E Unable to create the connection IO Error: The Network Adapter could not establish the connection.
The issue is solved just restarting the job.
Customer has involved oracle support on the issue and Oracle did say that the issue is caused from a "headless connection" by providing above sentence as the casue of the problem .
Could you please help me what is "headless connection" and when will it occur.