Not able to establish Oracle connection

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1

Not able to establish Oracle connection

oracle error
oracle error1102×479 22.3 KB

2

Hi Amit,

Below are the possible reasons for this issue, could you please check.

  • Wrong URL

  • Wrong port number or IP address (or DNS hostname) was used

  • The listener is not configured properly

  • The listener process (service) is not running. You can re-start it with the “lsnrctl start” command or on Windows by starting the listener service.