Hadoop UI - Unable to connect to the application master from the Hadoop UI.

Susheel Kumar Gadalay

2014-09-29 04:44:46 UTC

I also faced some issue like this.

It shows the URL in <host name>:<port>

Copy paste the link in browser and expand the host name.

I set up the host names in windows user etc/hosts file but still it
could not resolve.

Post by S.L
Hi All,
I am running a 3 node Apache Hadoop YARN 2.3.0 cluster , after a job is
submitted , when I ascess the application master from the UI I get the
following exception and I am unable to connect to the Application Master
from the UI, can someone let me know , what I need to look at?
HTTP ERROR 500
Connection refused
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:280)
at
org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:80)
at
org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:122)
at
org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
at
org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
at
org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
at
org.apache.hadoop.yarn.server.webproxy.WebAppProxyServlet.proxyLink(WebAppProxyServlet.java:185)
at
org.apache.hadoop.yarn.server.webproxy.WebAppProxyServlet.doGet(WebAppProxyServlet.java:336)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
at
com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:66)
at
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:900)
at
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:834)
at
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:795)
at
com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:163)
at
com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58)
at
com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at
org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:109)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at
org.apache.hadoop.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1183)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)