18/05/23 07:19:57 WARN ServletHandler: 
javax.servlet.ServletException: Could not determine the proxy server for redirection
	at org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter.findRedirectUrl(AmIpFilter.java:205)
	at org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter.doFilter(AmIpFilter.java:145)
	at org.spark-project.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1478)
	at org.spark-project.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)
	at org.spark-project.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
	at org.spark-project.jetty.servlet.ServletHandler.doScope(ServletHandler.java:427)
	at org.spark-project.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
	at org.spark-project.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
	at org.spark-project.jetty.server.handler.GzipHandler.handle(GzipHandler.java:264)
	at org.spark-project.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
	at org.spark-project.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
	at org.spark-project.jetty.server.Server.handle(Server.java:370)
	at org.spark-project.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
	at org.spark-project.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:973)
	at org.spark-project.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1035)
	at org.spark-project.jetty.http.HttpParser.parseNext(HttpParser.java:641)
	at org.spark-project.jetty.http.HttpParser.parseAvailable(HttpParser.java:231)
	at org.spark-project.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
	at org.spark-project.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
	at org.spark-project.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
	at org.spark-project.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
	at org.spark-project.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
	at java.lang.Thread.run(Thread.java:748)