JNDI Name lookup of the DataSource returns NULL

Hi,
I'm having a problem to obtain DataSource using JNDI Name lookup.
Please see my code below:

Connection connection = null;
DataSource dataSource = null;
try {
final Context initContext = new InitialContext();
dataSource = (DataSource) initContext.lookup("java:/MyDataSource"); connection = dataSource.getConnection();
} catch (Exception e) {
LOGGER.error(e);
}

I'm doing initContext.lookup from a servlet, everything is working on JBoss EAP 6.2.0.GA (AS 7.3.0.Final-redhat-14).

Also I can find and test connection of my “java:/MyDataSource” under the “Datasources” section of the WildFly Administration Console just fine(anoter word the datasource is there).