本机环境：win10
Tomcat 8.5.37
Java8
Mysql5.7

完整堆栈信息：
[11-04 16:37:37.033] [INFO] [DefaultModuleContext] Starting thread(Cat-ModelService-3) ...
[11-04 16:37:38.043] [ERROR] [HttpServlet] Error occured when handling uri: /cat/r/e
java.lang.RuntimeException: Error occured during handling outbound action(e)
at org.unidal.web.mvc.lifecycle.DefaultRequestLifecycle.handleException(DefaultRequestLifecycle.java:89)
at org.unidal.web.mvc.lifecycle.DefaultRequestLifecycle.handleRequest(DefaultRequestLifecycle.java:190)
at org.unidal.web.mvc.lifecycle.DefaultRequestLifecycle.handle(DefaultRequestLifecycle.java:63)
at org.unidal.web.MVC.service(MVC.java:90)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at com.dianping.cat.report.view.DomainFilter.doFilter(DomainFilter.java:105)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at com.dianping.cat.system.page.permission.PermissionFilter.doFilter(PermissionFilter.java:94)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at com.dianping.cat.servlet.CatFilter$Context.handle(CatFilter.java:439)
at com.dianping.cat.servlet.CatFilter$CatHandler$3.handle(CatFilter.java:236)
at com.dianping.cat.servlet.CatFilter$Context.handle(CatFilter.java:437)
at com.dianping.cat.servlet.CatFilter$CatHandler$4.handle(CatFilter.java:329)
at com.dianping.cat.servlet.CatFilter$Context.handle(CatFilter.java:437)
at com.dianping.cat.servlet.CatFilter$CatHandler$2.handle(CatFilter.java:219)
at com.dianping.cat.servlet.CatFilter$Context.handle(CatFilter.java:437)
at com.dianping.cat.servlet.CatFilter$CatHandler$1.handle(CatFilter.java:127)
at com.dianping.cat.servlet.CatFilter$Context.handle(CatFilter.java:437)
at com.dianping.cat.servlet.CatFilter.doFilter(CatFilter.java:65)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.unidal.web.mvc.ActionException: Error occured during handling outbound action(e)
at org.unidal.web.mvc.lifecycle.DefaultOutboundActionHandler.handle(DefaultOutboundActionHandler.java:36)
at org.unidal.web.mvc.lifecycle.DefaultRequestLifecycle.handleOutboundAction(DefaultRequestLifecycle.java:111)
at org.unidal.web.mvc.lifecycle.DefaultRequestLifecycle.handleRequest(DefaultRequestLifecycle.java:188)
... 43 more
Caused by: java.lang.RuntimeException: Error occured during invoking method: public void com.dianping.cat.report.page.event.Handler.handleOutbound(com.dianping.cat.report.page.event.Context) throws javax.servlet.ServletException,java.io.IOException with parameters([com.dianping.cat.report.page.event.Context@116d0273])
at org.unidal.lookup.util.ReflectUtils.invokeMethod(ReflectUtils.java:51)
at org.unidal.web.mvc.lifecycle.DefaultOutboundActionHandler.handle(DefaultOutboundActionHandler.java:29)
... 45 more
Caused by: java.lang.NullPointerException
at com.dianping.cat.report.page.event.transform.AllMachineMerger.visitEventReport(AllMachineMerger.java:49)
at com.dianping.cat.report.page.event.transform.EventMergeHelper.mergeAllIps(EventMergeHelper.java:30)
at com.dianping.cat.report.page.event.Handler.handleOutbound(Handler.java:222)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.unidal.lookup.util.ReflectUtils.invokeMethod(ReflectUtils.java:49)
... 46 more