I am in the process of upgrading the controller from 18.104.22.168 from 4.4 using Enterprise console but it got failed due to the below error. Can anyone help me on this?
Controller Discover & Upgrade Job - Wed Jan 24 2018 08:48:46 GMT+0000 (GMT Standard Time)
Task failed: Querying the db data dir - @@datadir from controller database on host: lcbspapdy001 with message: Error occurred during connecting to [jdbc:mysql://localhost:3388]: [Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.]
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