Revert HDFS-7813.

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

@@ -799,9 +799,6 @@ Release 2.7.0 - UNRELEASED
     HDFS-7814. Fix usage string of storageType parameter for
     "dfsadmin -setSpaceQuota/clrSpaceQuota". (Xiaoyu Yao via cnauroth)
 
-    HDFS-7813. TestDFSHAAdminMiniCluster#testFencer testcase is failing
-    frequently. (Rakesh R via cnauroth)
-
     HDFS-7009. Active NN and standby NN have different live nodes.
     (Ming Ma via cnauroth)
 

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

@@ -155,7 +155,6 @@ public class TestDFSHAAdminMiniCluster {
     tool.setConf(conf);
     assertEquals(0, runTool("-transitionToActive", "nn1"));
     assertEquals(0, runTool("-failover", "nn1", "nn2"));
-    assertEquals(0, runTool("-failover", "nn2", "nn1"));
     
     // Test failover with fencer and nameservice
     assertEquals(0, runTool("-ns", "minidfs-ns", "-failover", "nn2", "nn1"));