HDFS-10816. TestComputeInvalidateWork#testDatanodeReRegistration fails due to race between test and replication monitor. Contributed by Eric Badger.

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestComputeInvalidateWork.java

@@ -63,6 +63,7 @@ public class TestComputeInvalidateWork {
     namesystem = cluster.getNamesystem();
     bm = namesystem.getBlockManager();
     nodes = bm.getDatanodeManager().getHeartbeatManager().getDatanodes();
+    BlockManagerTestUtil.stopRedundancyThread(bm);
     assertEquals(nodes.length, NUM_OF_DATANODES);
   }