We have a Nifi Process that hits DB, after DB upgrade we are getting below error.

[#1]

[#2]

Version of NIFI  - 1.17

[#3]

@hkh 

After upgrading your DB, did you upgrade the driver being used in the DBCPConnectionPool controller service to the latest?

This may be reason why the controller service is still trying to enable.  You may also want to look at a NiFi thread dump to see what that enabling Controller service is waitin on

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Thank you,
Matt