FULL PRODUCT VERSION :
C:\Programme\Java\jdk1.6.0\bin>java -version
java version "1.6.0"
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Windows XP prof. SP-2

A DESCRIPTION OF THE PROBLEM :
In the javadoc of javax.sql.DataSource is written:
A driver that is accessed via a DataSource object does not register itself with the DriverManager.

The current implementation of Java 6.0 of sun.jdbc.odbc.ee.DataSource does not fulfil this directive.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Instantiate an sun.jdbc.odbc.ee.DataSource object, and invoke method getConnection() .

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
A driver that is accessed via a DataSource object should not register itself with the DriverManager.
ACTUAL -
Invoking of 'new JdbcOdbcDriver()' automatically registers the driver with the DriverManager.
See source code below ...

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
See the part of the source code of class sun.jdbc.odbc.ee.DataSource:

    public Connection getConnection() throws SQLException{
     attrib = super.getAttributes();
     JdbcOdbcDriver driver = new JdbcOdbcDriver();
     driver.setTimeOut(super.getLoginTimeout());
     driver.setWriter(super.getLogWriter());
  return driver.connect(attrib.getUrl(),attrib.getProperties());
    }

Invoking of 'new JdbcOdbcDriver()' automatically registers the driver with the DriverManager.

The source code should be something like this:

    public Connection getConnection() throws SQLException {
        // Load our ODBC API object allocate the environment handle,
        // create the connection object and connect it.
        return new JdbcOdbcConnection(getOdbcApi().initialize()).initialize(getConnectProperties());
    }


---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use: https://jdbc-odbc-enhanced.dev.java.net