2555858 - MDM Change Tracker application does not work - Database access error

After setting Up Change Tracker application, ping test shows the followings:

"Cannot establish a connection. For details, see message area."

"Database access error occured. See logs for details."

As a result the Change Tracker application in portal shows empty fields and no options can be chosen.

In defaultTrace files the following exception can be found:

...
Exception of type com.sap.sql.log.OpenSQLException caught: Exception of type java.sql.SQLException caught: Invalid Oracle URL specified: OracleDataSource.makeURL..
[EXCEPTION]
com.sap.sql.log.OpenSQLException: Exception of type java.sql.SQLException caught: Invalid Oracle URL specified: OracleDataSource.makeURL.
...
Caused by: java.sql.SQLException: Invalid Oracle URL specified: OracleDataSource.makeURL
...

AS Java all versions with Oracle database.

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