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java.lang.NullPointerException: 	at java.lang.String.startsWith(String.java:1421)	at java.lang.String.startsWith(String.java:1450)	at hudson.maven.MavenModuleSetBuild$1.isDescendantOf(MavenModuleSetBuild.java:178)	at hudson.maven.MavenModuleSetBuild$1.(MavenModuleSetBuild.java:147)	at hudson.maven.MavenModuleSetBuild.getChangeSetFor(MavenModuleSetBuild.java:141)	at hudson.maven.FilteredChangeLogSet.(FilteredChangeLogSet.java:51)	at hudson.maven.MavenBuild.getChangeSet(MavenBuild.java:161)	at hudson.model.View$People.getUserInfo(View.java:496)	at hudson.model.View$People.(View.java:474)	at hudson.model.Hudson.getPeople(Hudson.java:815)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:282)	at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:204)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:562)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:640)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:478)	at org.kohsuke.stapler.Stapler.service(Stapler.java:160)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:45)	at winstone.ServletConfiguration.execute(ServletConfiguration.java:249)	at winstone.RequestDispatcher.forward(RequestDispatcher.java:335)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:378)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)	at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:151)	at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:129)	at net.bull.javamelody.PluginMonitoringFilter.doFilter(PluginMonitoringFilter.java:69)	at org.jvnet.hudson.plugins.monitoring.HudsonMonitoringFilter.doFilter(HudsonMonitoringFilter.java:46)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:97)	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:195)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:195)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:195)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)	at winstone.RequestDispatcher.forward(RequestDispatcher.java:333)	at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:244)	at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150)	at java.lang.Thread.run(Thread.java:662)