Error tersebut terjadi pada JDK 8. Untuk membetulkannya, lakukan hal berikut
sudo su echo "javax.xml.accessExternalSchema = all" > /usr/lib/jvm/java-8-oracle/jre/lib/jaxp.properties exit
Sumber: http://stackoverflow.com/questions/23011547/webservice-client-generation-error-with-jdk8
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