What are the steps to reproduce your problem?

• Have a process instance with a multi-instance activity
• Use Cockpit to start before the activity (not the MI body)
• Apply modification
• Go to process definition view

What is the problem?

• No tokens displayed in Process Definition view
• Server Error:The server reported an internal error. Try to refresh the page or login and out of the application.
• Stacktrace:

  11:30:58,154 WARNING [ExceptionHandler] (http-/127.0.0.1:8080-2) java.lang.NullPointerException
  	at org.camunda.bpm.engine.rest.dto.repository.ActivityStatisticsResultDto.fromActivityStatistics(ActivityStatisticsResultDto.java:26)
  	at org.camunda.bpm.engine.rest.sub.repository.impl.ProcessDefinitionResourceImpl.getActivityStatistics(ProcessDefinitionResourceImpl.java:219)
  	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
  	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  	at java.lang.reflect.Method.invoke(Method.java:606)
  	at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:167)
  	at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:257)
  	at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:222)
  	at org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:159)
  	at org.jboss.resteasy.core.ResourceLocator.invoke(ResourceLocator.java:107)
  	at org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:154)
  	at org.jboss.resteasy.core.ResourceLocator.invoke(ResourceLocator.java:92)
  	at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:542)
  	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:524)
  	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:126)
  	at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
  	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
  	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
  	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
  	at org.camunda.bpm.engine.rest.filter.CacheControlFilter.doFilter(CacheControlFilter.java:41)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
  	at org.camunda.bpm.webapp.impl.security.filter.SecurityFilter.doFilterSecure(SecurityFilter.java:67)
  	at org.camunda.bpm.webapp.impl.security.filter.SecurityFilter.doFilter(SecurityFilter.java:51)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
  	at org.camunda.bpm.webapp.impl.security.auth.AuthenticationFilter$1.execute(AuthenticationFilter.java:59)
  	at org.camunda.bpm.webapp.impl.security.auth.AuthenticationFilter$1.execute(AuthenticationFilter.java:56)
  	at org.camunda.bpm.webapp.impl.security.SecurityActions.runWithAuthentications(SecurityActions.java:38)
  	at org.camunda.bpm.webapp.impl.security.auth.AuthenticationFilter.doFilter(AuthenticationFilter.java:56)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
  	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149)
  	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
  	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145)
  	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
  	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102)
  	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336)
  	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
  	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653)
  	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920)
  	at java.lang.Thread.run(Thread.java:724)
  
  11:37:05,028 WARNING [ExceptionHandler] (http-/127.0.0.1:8080-1) java.lang.NullPointerException
  	at org.camunda.bpm.engine.rest.dto.repository.ActivityStatisticsResultDto.fromActivityStatistics(ActivityStatisticsResultDto.java:26)
  	at org.camunda.bpm.engine.rest.sub.repository.impl.ProcessDefinitionResourceImpl.getActivityStatistics(ProcessDefinitionResourceImpl.java:219)
  	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
  	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  	at java.lang.reflect.Method.invoke(Method.java:606)
  	at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:167)
  	at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:257)
  	at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:222)
  	at org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:159)
  	at org.jboss.resteasy.core.ResourceLocator.invoke(ResourceLocator.java:107)
  	at org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:154)
  	at org.jboss.resteasy.core.ResourceLocator.invoke(ResourceLocator.java:92)
  	at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:542)
  	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:524)
  	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:126)
  	at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
  	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
  	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
  	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
  	at org.camunda.bpm.engine.rest.filter.CacheControlFilter.doFilter(CacheControlFilter.java:41)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
  	at org.camunda.bpm.webapp.impl.security.filter.SecurityFilter.doFilterSecure(SecurityFilter.java:67)
  	at org.camunda.bpm.webapp.impl.security.filter.SecurityFilter.doFilter(SecurityFilter.java:51)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
  	at org.camunda.bpm.webapp.impl.security.auth.AuthenticationFilter$1.execute(AuthenticationFilter.java:59)
  	at org.camunda.bpm.webapp.impl.security.auth.AuthenticationFilter$1.execute(AuthenticationFilter.java:56)
  	at org.camunda.bpm.webapp.impl.security.SecurityActions.runWithAuthentications(SecurityActions.java:38)
  	at org.camunda.bpm.webapp.impl.security.auth.AuthenticationFilter.doFilter(AuthenticationFilter.java:56)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
  	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149)
  	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
  	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145)
  	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
  	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102)
  	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336)
  	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
  	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653)
  	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920)
  	at java.lang.Thread.run(Thread.java:724)
  

What would be the expected behavior:

• Process Definition view is displayed with tokens showing the status of instances.
• No NPE