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problem deploying activiti to wildfly 8.1.0.Final

Question asked by rogerparkinson on Apr 14, 2015
Latest reply on Apr 16, 2015 by trademak
I pulled the source for 5.17.1-SNAPSHOT and ran the build, got a war file, deployed to wildfly 8.1.0.Final
It loaded up okay. When I went to http://localhost:8080/activiti-webapp-explorer2/ I see a mangled login screen (there's a stack trace in it) but more importantly there is a stacktrace in the log:
14:50:02,794 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-16) JBAS017534: Registered web context: /activiti-webapp-explorer2
14:50:02,899 INFO  [] (XNIO-1 task-9) JBAS018559: Deployed "activiti-webapp-explorer2-5.17.1-SNAPSHOT.war" (runtime-name : "activiti-webapp-explorer2.war")
14:50:35,971 ERROR [io.undertow.request] (default task-5) UT005023: Exception handling request to /activiti-webapp-explorer2/ui/APP/2/login: java.lang.NullPointerException
   at io.undertow.servlet.spec.HttpServletResponseImpl.sendRedirect( [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
   at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.handleServiceSessionExpired( [vaadin-6.8.8.jar:6.8.8]
   at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service( [vaadin-6.8.8.jar:6.8.8]
   at javax.servlet.http.HttpServlet.service( [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
This does deploy fine on tomcat so whatever is going on is specific to wildfly (and wildfly is what my boss wants to see).
Is there some trick I missed. I see others have got it going.