Stats Summary does not work in Traffic Monitor

[dneuman64]

The stats summary link in Traffic Monitor does not work. When you click the link the browser hangs and eventually returns the following error:

java.util.ConcurrentModificationException
     at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:953)
     at java.util.LinkedList$ListItr.next(LinkedList.java:886)
     at com.comcast.cdn.traffic_control.traffic_monitor.health.AbstractState.getSummary(AbstractState.java:120)
     at com.comcast.cdn.traffic_control.traffic_monitor.publish.StatSummary.getJson(StatSummary.java:58)
     at com.comcast.cdn.traffic_control.traffic_monitor.publish.JsonPage.renderPage(JsonPage.java:51)
     at org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:115)
     at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:237)
     at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:165)
     at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:814)
     at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
     at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:253)
     at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210)
     at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:281)
     at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188)
     at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:245)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
     at java.lang.Thread.run(Thread.java:745
```)