HDFS-6754. TestNamenodeCapacityReport.testXceiverCount may sometimes fail due to lack of retry. Contributed by Mit Desai.

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

@@ -780,6 +780,9 @@ Release 2.6.0 - UNRELEASED
 
     HDFS-4227. Document dfs.namenode.resource.*  (Daisuke Kobayashi via aw)
 
+    HDFS-6754. TestNamenodeCapacityReport may sometimes fail due to lack of
+    retry. (Mit Desai via kihwal)
+
     BREAKDOWN OF HDFS-6134 AND HADOOP-10150 SUBTASKS AND RELATED JIRAS
   
       HDFS-6387. HDFS CLI admin tool for creating & deleting an

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNamenodeCapacityReport.java

@@ -169,8 +169,8 @@ public class TestNamenodeCapacityReport {
   @Test
   public void testXceiverCount() throws Exception {
     Configuration conf = new HdfsConfiguration();
-    // don't waste time retrying if close fails
-    conf.setInt(DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_KEY, 0);
+    // retry one time, if close fails
+    conf.setInt(DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_KEY, 1);
     MiniDFSCluster cluster = null;
 
     final int nodes = 8;