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Xuan Gong commented on YARN-1482: --------------------------------- bq.You are starting the web-app directly in the RM as well as part of the RMActiveServices. Move the startWebApp() from active service to Alway-on service. So, when the RM is running, no matter it is active or standby, the webAppProxy will be alway running (if it is embedded mode). bq.Please add tests to verify the fail-over of web-app proxy in both embedded and stand-alone mode. Add separate test to test both embedded and stand-alone mode. I add this code {code} conf.set(YarnConfiguration.PROXY_ADDRESS, "0.0.0.0:9099"); {code} in TestRMFailOver.java to pass the test case. Otherwise it will throw out this exception: {code} 2014-01-02 13:55:47,824 INFO service.AbstractService (AbstractService.java:noteFailure(272)) - Service org.apache.hadoop.yarn.client.api.impl.YarnClientImpl failed in state STARTED; cause: java.lang.IllegalArgumentException: ResourceManager does not support this protocol java.lang.IllegalArgumentException: ResourceManager does not support this protocol at com.google.common.base.Preconditions.checkArgument(Preconditions.java:88) at org.apache.hadoop.yarn.server.api.ServerRMProxy.checkAllowedProtocols(ServerRMProxy.java:80) at org.apache.hadoop.yarn.client.ConfiguredRMFailoverProxyProvider.init(ConfiguredRMFailoverProxyProvider.java:58) at org.apache.hadoop.yarn.client.RMProxy.createRMFailoverProxyProvider(RMProxy.java:158) at org.apache.hadoop.yarn.client.RMProxy.createRMProxy(RMProxy.java:89) at org.apache.hadoop.yarn.client.ClientRMProxy.createRMProxy(ClientRMProxy.java:68) at org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.serviceStart(YarnClientImpl.java:109) at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193) at org.apache.hadoop.yarn.client.TestRMFailover.verifyClientConnection(TestRMFailover.java:114) at org.apache.hadoop.yarn.client.TestRMFailover.testExplicitFailover(TestRMFailover.java:132) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) {code} I am not sure what is happening here. It might be a bug from miniYarnCluster. Also, test the patch in single node cluster, it works as expected. > WebApplicationProxy should be always-on w.r.t HA even if it is embedded in > the RM > --------------------------------------------------------------------------------- > > Key: YARN-1482 > URL: https://issues.apache.org/jira/browse/YARN-1482 > Project: Hadoop YARN > Issue Type: Sub-task > Reporter: Vinod Kumar Vavilapalli > Assignee: Xuan Gong > Attachments: YARN-1482.1.patch, YARN-1482.2.patch, YARN-1482.3.patch > > > This way, even if an RM goes to standby mode, we can affect a redirect to the > active. And more importantly, users will not suddenly see all their links > stop working. -- This message was sent by Atlassian JIRA (v6.1.5#6160)