diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index d7cf30f4623..7d4733baa88 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -1177,6 +1177,9 @@ Release 0.23.3 - UNRELEASED
     HDFS-3331. In namenode, check superuser privilege for setBalancerBandwidth
     and acquire the write lock for finalizeUpgrade.  (szetszwo)
 
+    HDFS-3037. TestMulitipleNNDataBlockScanner#testBlockScannerAfterRestart is
+    racy. (atm)
+
 Release 0.23.2 - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestMulitipleNNDataBlockScanner.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestMulitipleNNDataBlockScanner.java
index cff718b86fa..14a0da38043 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestMulitipleNNDataBlockScanner.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestMulitipleNNDataBlockScanner.java
@@ -149,6 +149,9 @@ public class TestMulitipleNNDataBlockScanner {
       cluster.waitActive();
       DataNode dn = cluster.getDataNodes().get(0);
       for (int i = 0; i < 3; i++) {
+        while (!dn.blockScanner.isInitialized(bpids[i])) {
+          Thread.sleep(1000);
+        }
         long blocksScanned = 0;
         while (blocksScanned != 20) {
           if (dn.blockScanner != null) {