From 4b16c2b65ea92bc7b3cfd32ea802f94e35cbb337 Mon Sep 17 00:00:00 2001
From: Konstantin Boudnik <cos@apache.org>
Date: Tue, 14 Jan 2014 21:59:51 +0000
Subject: [PATCH] HDFS-5677. Need error checking for HA cluster configuration.
 Contributed by Vincent Sheffer.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1558217 13f79535-47bb-0310-9956-ffa450edef68
---
 hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt                 | 3 +++
 .../src/main/java/org/apache/hadoop/hdfs/DFSUtil.java       | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 682f77a2d76..fcc5f067b26 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -924,6 +924,9 @@ Release 2.3.0 - UNRELEASED
     HDFS-5675. Add Mkdirs operation to NNThroughputBenchmark.
     (Plamen Jeliazkov via shv)
 
+    HDFS-5677. Need error checking for HA cluster configuration.
+    (Vincent Sheffer via cos)
+
   OPTIMIZATIONS
 
   BUG FIXES
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java
index 112fa063f16..1d0421e397b 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java
@@ -585,6 +585,12 @@ public class DFSUtil {
       String address = getConfValue(defaultValue, suffix, conf, keys);
       if (address != null) {
         InetSocketAddress isa = NetUtils.createSocketAddr(address);
+        if (isa.isUnresolved()) {
+          LOG.warn("Namenode for " + nsId +
+                   " remains unresolved for ID " + nnId +
+                   ".  Check your hdfs-site.xml file to " +
+                   "ensure namenodes are configured properly.");
+        }
         ret.put(nnId, isa);
       }
     }