Struts app fails to deploy with javax.servlet.UnavailableException: org.apache.commons.validator.ValidatorResources.<init>([Ljava/lang/String;)V

Issue

• Hello, our struts application is failing to deploy with this exception:

16:58:34,485 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/struts-test]] (ServerService Thread Pool -- 78) JBWEB000289: Servlet action threw load() exception: javax.servlet.UnavailableException: org.apache.commons.validator.ValidatorResources.<init>([Ljava/lang/String;)V
  at org.apache.struts.action.ActionServlet.init(ActionServlet.java:399) [struts-core-1.3.5.jar:1.3.5]
  at javax.servlet.GenericServlet.init(GenericServlet.java:242) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-1.jar:1.0.2.Final-redhat-1]
  at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1194) [jbossweb-7.4.10.Final-redhat-1.jar:7.4.10.Final-redhat-1]
  at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1100) [jbossweb-7.4.10.Final-redhat-1.jar:7.4.10.Final-redhat-1]
  at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3591) [jbossweb-7.4.10.Final-redhat-1.jar:7.4.10.Final-redhat-1]
  at org.apache.catalina.core.StandardContext.start(StandardContext.java:3798) [jbossweb-7.4.10.Final-redhat-1.jar:7.4.10.Final-redhat-1]
  at org.jboss.as.web.deployment.WebDeploymentService.doStart(WebDeploymentService.java:161) [jboss-as-web-7.4.3.Final-redhat-2.jar:7.4.3.Final-redhat-2]
  at org.jboss.as.web.deployment.WebDeploymentService.access$000(WebDeploymentService.java:59) [jboss-as-web-7.4.3.Final-redhat-2.jar:7.4.3.Final-redhat-2]
  at org.jboss.as.web.deployment.WebDeploymentService$1.run(WebDeploymentService.java:94) [jboss-as-web-7.4.3.Final-redhat-2.jar:7.4.3.Final-redhat-2]
  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [rt.jar:1.7.0_40]
  at java.util.concurrent.FutureTask.run(FutureTask.java:262) [rt.jar:1.7.0_40]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_40]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_40]
  at java.lang.Thread.run(Thread.java:724) [rt.jar:1.7.0_40]
  at org.jboss.threads.JBossThread.run(JBossThread.java:122)