The following NPE is raised: -

java.lang.NullPointerException
at org.jboss.ws.tools.helpers.ToolsHelper.handleWSDLToJavaGeneration(ToolsHelper.java:335)
at org.jboss.ws.tools.WSTools.process(WSTools.java:137)
at org.jboss.ws.tools.WSTools.generate(WSTools.java:69)
at org.jboss.ws.tools.WSTools.generate(WSTools.java:119)
at org.jboss.ws.tools.ant.wstools.execute(wstools.java:101)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
at org.apache.tools.ant.Task.perform(Task.java:364)
at org.apache.tools.ant.Target.execute(Target.java:341)
at org.apache.tools.ant.Target.performTasks(Target.java:369)

With the following wstools config less the global namespace package mapping: -

<?xml version="1.0" encoding="UTF-8"?>

<configuration xmlns="http://www.jboss.org/jbossws-tools"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.jboss.org/jbossws-tools http://www.jboss.org/jbossws-tools/schema/jbossws-tool_1_0.xsd">

<global>
<package-namespace package="org.jboss.support.phonebook" namespace="http://www.jboss.org/support/phonebook"/>
</global>

<wsdl-java location="descriptors/PhoneBook.wsdl" parameter-style="bare">
<mapping file="jaxrpc-mapping.xml" />
<webservices servlet-link="PhoneBook" />
</wsdl-java>

</configuration>