HDFS-7785. Improve diagnostics information for HttpPutFailedException. Contributed by Chengbing Liu.

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

@@ -762,6 +762,9 @@ Release 2.7.0 - UNRELEASED
     HDFS-6753. Initialize checkDisk when DirectoryScanner not able to get
     files list for scanning (J.Andreina via vinayakumarb)
 
+    HDFS-7785. Improve diagnostics information for HttpPutFailedException.
+    (Chengbing Liu via wheat9)
+
     BREAKDOWN OF HDFS-7584 SUBTASKS AND RELATED JIRAS
 
       HDFS-7720. Quota by Storage Type API, tools and ClientNameNode

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

@@ -291,7 +291,9 @@ public class TransferFsImage {
 
       int responseCode = connection.getResponseCode();
       if (responseCode != HttpURLConnection.HTTP_OK) {
-        throw new HttpPutFailedException(connection.getResponseMessage(),
+        throw new HttpPutFailedException(String.format(
+            "Image uploading failed, status: %d, url: %s, message: %s",
+            responseCode, urlWithParams, connection.getResponseMessage()),
             responseCode);
       }
     } catch (AuthenticationException e) {