HADOOP-10562: Merging r1591782 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1591783 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -105,6 +105,10 @@ Release 2.5.0 - UNRELEASED
     HADOOP-10543. RemoteException's unwrapRemoteException method failed for
     PathIOException. (Yongjun Zhang via atm)
 
+    HADOOP-10562. Namenode exits on exception without printing stack trace
+    in AbstractDelegationTokenSecretManager. (Suresh Srinivas via Arpit
+    Agarwal)
+
 Release 2.4.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/token/delegation/AbstractDelegationTokenSecretManager.java

@@ -560,8 +560,7 @@ extends AbstractDelegationTokenIdentifier>
           }
         }
       } catch (Throwable t) {
-        LOG.error("ExpiredTokenRemover thread received unexpected exception. "
-            + t);
+        LOG.error("ExpiredTokenRemover thread received unexpected exception", t);
         Runtime.getRuntime().exit(-1);
       }
     }