YARN-264. y.s.rm.DelegationTokenRenewer attempts to renew token even after removing an app. (kkambatl via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1421575 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -125,6 +125,9 @@ Release 2.0.3-alpha - Unreleased
 
     YARN-267. Fix fair scheduler web UI. (Sandy Ryza via tomwhite)
 
+    YARN-264. y.s.rm.DelegationTokenRenewer attempts to renew token even 
+    after removing an app. (kkambatl via tucu)
+
 Release 2.0.2-alpha - 2012-09-07 
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/DelegationTokenRenewer.java

@@ -301,13 +301,18 @@ public class DelegationTokenRenewer extends AbstractService {
    */
   private class RenewalTimerTask extends TimerTask {
     private DelegationTokenToRenew dttr;
+    private boolean cancelled = false;
     
     RenewalTimerTask(DelegationTokenToRenew t) {  
       dttr = t;  
     }
     
     @Override
-    public void run() {
+    public synchronized void run() {
+      if (cancelled) {
+        return;
+      }
+
       Token<?> token = dttr.token;
       try {
         // need to use doAs so that http can find the kerberos tgt
@@ -331,6 +336,12 @@ public class DelegationTokenRenewer extends AbstractService {
         removeFailedDelegationToken(dttr);
       }
     }
+
+    @Override
+    public synchronized boolean cancel() {
+      cancelled = true;
+      return super.cancel();
+    }
   }
   
   /**