YARN-3526. ApplicationMaster tracking URL is incorrectly redirected on a QJM cluster. Contributed by Weiwei Yang

(cherry picked from commit b0ad644083a0dfae3a39159ac88b6fc09d846371)
(cherry picked from commit 802676e1be350785d8c0ad35f6676eeb85b2467b)
(cherry picked from commit 2cadeb9e017c6a75db16e1f23b2accda04f12298)

hadoop-yarn-project/CHANGES.txt

@@ -138,6 +138,9 @@ Release 2.6.1 - UNRELEASED
     YARN-3641. NodeManager: stopRecoveryStore() shouldn't be skipped when
     exceptions happen in stopping NM's sub-services. (Junping Du via jlowe)
 
+    YARN-3526. ApplicationMaster tracking URL is incorrectly redirected
+    on a QJM cluster. (Weiwei Yang via xgong)
+
 Release 2.6.0 - 2014-11-18
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/TestRMFailover.java

@@ -321,6 +321,9 @@ public class TestRMFailover extends ClientBaseWithFixes {
     header = getHeader("Refresh", rm2Url + "/ws/v1/cluster/apps");
     assertTrue(header.contains("; url=" + rm1Url));
 
+    header = getHeader("Refresh", rm2Url + "/proxy/" + fakeAppId);
+    assertEquals(null, header);
+
     // Due to the limitation of MiniYARNCluster and dispatcher is a singleton,
     // we couldn't add the test case after explicitFailover();
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMWebAppFilter.java

@@ -30,6 +30,7 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import org.apache.hadoop.http.HtmlQuoting;
+import org.apache.hadoop.yarn.server.webproxy.ProxyUriUtils;
 
 import com.google.common.collect.Sets;
 import com.google.inject.Injector;
@@ -88,6 +89,7 @@ public class RMWebAppFilter extends GuiceContainer {
   private boolean shouldRedirect(RMWebApp rmWebApp, String uri) {
     return !uri.equals("/" + rmWebApp.wsName() + "/v1/cluster/info")
         && !uri.equals("/" + rmWebApp.name() + "/cluster")
+        && !uri.startsWith(ProxyUriUtils.PROXY_BASE)
         && !NON_REDIRECTED_URIS.contains(uri);
   }
 }