Oracle Database Connection Failed

Hi all,

I was using Knime 3.5 version and today I updated to version 3.6. With Knime 3.5 I was able to connect to an Oracle database with a database connector node. However, now with version 3.6 I am getting this error:

ERROR Database Connector 0:49 Execute failed: Could not create a connection to the database: Maximum number of retries to get a valid connection reached. JDBC URL:

I am using class12.jar

Any suggestion on why I can’t connect to the database?

Thank you.

Sounds like a similar problem mentioned here.


Hi Thor,

Thank you so much! Solved I replace the database drive to ojdbc8.jar and now works!


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