HDFS-10270. TestJMXGet:testNameNode() fails. Contributed by Gergely Novák

(cherry picked from commit d2f3bbc29046435904ad9418073795439c71b441)
(cherry picked from commit ccaf746eeacfafc7392a994f28ee9dbf595c84af)
(cherry picked from commit 9f5a22ff22b4841f78ac87c71c291456d20ef4d6)

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

@@ -26,6 +26,8 @@ Release 2.6.6 - UNRELEASED
     HDFS-9740. Use a reasonable limit in DFSTestUtil.waitForMetric()
     (Chang Li via vinayakumarb)
 
+    HDFS-10270. TestJMXGet:testNameNode() fails. Contributed by Gergely Novák.
+
 Release 2.6.5 - 2016-10-08
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/tools/TestJMXGet.java

@@ -120,9 +120,6 @@ public class TestJMXGet {
         jmx.getValue("NumLiveDataNodes")));
     assertGauge("CorruptBlocks", Long.parseLong(jmx.getValue("CorruptBlocks")),
                 getMetrics("FSNamesystem"));
-    DFSTestUtil.waitForMetric(jmx, "NumOpenConnections", numDatanodes);
-    assertEquals(numDatanodes, Integer.parseInt(
-        jmx.getValue("NumOpenConnections")));
 
     cluster.shutdown();
     MBeanServerConnection mbsc = ManagementFactory.getPlatformMBeanServer();