Oracle JDBC Step triggers "Internal Server Error. Could not connect to the specified database. Please check the logs for more detail" Issue Test connection on jdbc_connection.do page is successfulOpen Flow designer > actions with JDBC stepSelect test JDBC Step and it will show an error like Internal Server Error. Could not connect to the specified database. Please check the logs for more detail.ReleaseAllCauseThe issue is related to the testing of the connectionThe Oracle driver requires the Service name (<sid>.<domain> ) in order to test correctThe Oracle driver will not query with the service name, only the SIDResolutionUpdate the connection details only with SID in the oracle_sid field and will query successfullyCheck the requirements to fill the jdbc_connection.do form in the documentation page JDBC stepTo grab errors from the Mid Server, refer to the KB Review the agent log for MID Server errorsVerify you can execute queries from the MID serverCheck the connection details including port number. Make sure access from firewall if there is any is allowed to the Oracle Port. The default value is 1521Verify you have the right JDBC driver installed in the mid serverFor more information about the JDBC driver, follow our documentation page JDBC type data source