HDFS-3817. Avoid printing SafeModeException stack trace in RPC server. Contributed by Brandon Li.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1376054 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -122,6 +122,9 @@ Trunk (unreleased changes)
 
     HDFS-2686. Remove DistributedUpgrade related code. (suresh)
 
+    HDFS-3817. Avoid printing SafeModeException stack trace.
+    (Brandon Li via suresh)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java

@@ -270,7 +270,10 @@ class NameNodeRpcServer implements NamenodeProtocols {
     this.minimumDataNodeVersion = conf.get(
         DFSConfigKeys.DFS_NAMENODE_MIN_SUPPORTED_DATANODE_VERSION_KEY,
         DFSConfigKeys.DFS_NAMENODE_MIN_SUPPORTED_DATANODE_VERSION_DEFAULT);
-  }
+
+    // Set terse exception whose stack trace won't be logged
+    this.clientRpcServer.addTerseExceptions(SafeModeException.class);
+ }
   
   /**
    * Actually start serving requests.