2014-04-19 16:29:31.535::WARN:  /job/Graphal/diskUsage/graph/map
java.lang.NullPointerException
        at hudson.plugins.disk_usage.ProjectDiskUsageAction.getGraph(ProjectDiskUsageAction.java:227)
        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:601)
        at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:288)
        at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:203)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:574)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:659)
        at org.kohsuke.stapler.MetaClass$12.dispatch(MetaClass.java:384)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:574)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:659)
        at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:574)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:659)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:488)
        at org.kohsuke.stapler.Stapler.service(Stapler.java:162)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:491)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1074)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:95)
        at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:87)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
        at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
        at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
        at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
        at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:185)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:689)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:391)
        at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:146)
        at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
        at org.mortbay.jetty.Server.handle(Server.java:285)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:457)
        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:751)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:500)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:209)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:357)
        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:329)
        at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)
Apr 19, 2014 4:29:44 PM hudson.model.Run run
INFO: Graphal #9 main build action completed: SUCCESS

        for (int i=builds.size()-1; i>=0; i--) {
            AbstractBuild build = builds.get(i);
            BuildDiskUsageAction dua = build.getAction(BuildDiskUsageAction.class);
            if (dua != null) {
                usages.add(new Object[]{build, getJobRootDirDiskUsage(), dua.getAllDiskUsage(), getAllSlaveWorkspaces(), getAllCustomOrNonSlaveWorkspaces()});
            }
            maxValue = Math.max(maxValue, dua.getAllDiskUsage());
        }