jetty-env.xml : java.lang.reflect.InvocationTargetException / java.lang.IllegalStateException: Nothing to bind for name ...

jetty-env.xml

<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://jetty.mortbay.org/configure.dtd">

<Configure class="org.eclipse.jetty.webapp.WebAppContext">
    <New id="LERG" class="org.eclipse.jetty.plus.jndi.Resource">
        <Arg></Arg>
        <Arg>jdbc/LERG</Arg>
        <Arg>
            <New class="org.postgresql.ds.PGPoolingDataSource">
                <Set name="user">redacted</Set>
                <Set name="password">redacted</Set>
                <Set name="databaseName">api</Set>
                <Set name="serverName">localhost</Set>
                <Set name="portNumber">5432</Set>
                <Set name="dataSourceName">lerg</Set>
                <Set name="initialConnections">5</Set>
            </New>
        </Arg>
    </New>
</Configure>