From 912631a226f85c2680e51a11d414ee92af5a57c9 Mon Sep 17 00:00:00 2001
From: Andrew Wang <wang@apache.org>
Date: Thu, 8 Sep 2016 18:30:18 -0700
Subject: [PATCH] HDFS-10831. Add log when URLConnectionFactory.openConnection
 failed. Contributed by yunjiong zhao.

(cherry picked from commit b07c266dca7f303c793b432a0738d593728cf2b3)
(cherry picked from commit 72ea64146810bb5010280145ee7cad9fb9375aad)
---
 .../java/org/apache/hadoop/hdfs/web/URLConnectionFactory.java    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/URLConnectionFactory.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/URLConnectionFactory.java
index 975f72e8f61..96095db8114 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/URLConnectionFactory.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/URLConnectionFactory.java
@@ -183,6 +183,7 @@ public class URLConnectionFactory {
       return openConnection(url, false);
     } catch (AuthenticationException e) {
       // Unreachable
+      LOG.error("Open connection {} failed", url, e);
       return null;
     }
   }