java.lang.NullPointerException
   at org.netbeans.modules.maven.j2ee.execution.ExecutionChecker.__isJrEnabled(ExecutionChecker.java:0)
   at org.netbeans.modules.maven.j2ee.execution.ExecutionChecker.checkRunConfig(ExecutionChecker.java:0)
   at org.netbeans.modules.maven.execute.PrereqCheckerMerger$Impl.checkRunConfig(PrereqCheckerMerger.java:87)
   at org.netbeans.modules.maven.api.execute.RunUtils.run(RunUtils.java:88)
   at org.netbeans.modules.maven.ActionProviderImpl.invokeAction(ActionProviderImpl.java:314)
   at org.netbeans.modules.maven.ActionProviderImpl$2.run(ActionProviderImpl.java:286)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)