diff --git a/LICENSE-binary b/LICENSE-binary
index 3ede3a04b9..bb8de2be7c 100644
--- a/LICENSE-binary
+++ b/LICENSE-binary
@@ -294,9 +294,9 @@ org.apache.commons:commons-lang3:3.7
 org.apache.commons:commons-math3:3.1.1
 org.apache.commons:commons-text:1.4
 org.apache.commons:commons-validator:1.6
-org.apache.curator:curator-client:2.13.0
-org.apache.curator:curator-framework:2.13.0
-org.apache.curator:curator-recipes:2.13.0
+org.apache.curator:curator-client:5.2.0
+org.apache.curator:curator-framework:5.2.0
+org.apache.curator:curator-recipes:5.2.0
 org.apache.geronimo.specs:geronimo-jcache_1.0_spec:1.0-alpha-1
 org.apache.hbase:hbase-annotations:1.4.8
 org.apache.hbase:hbase-client:1.4.8
@@ -323,7 +323,7 @@ org.apache.kerby:kerby-util:1.0.1
 org.apache.kerby:kerby-xdr:1.0.1
 org.apache.kerby:token-provider:1.0.1
 org.apache.yetus:audience-annotations:0.5.0
-org.apache.zookeeper:zookeeper:3.4.13
+org.apache.zookeeper:zookeeper:3.6.3
 org.codehaus.jackson:jackson-core-asl:1.9.13
 org.codehaus.jackson:jackson-jaxrs:1.9.13
 org.codehaus.jackson:jackson-mapper-asl:1.9.13
diff --git a/hadoop-common-project/hadoop-auth/pom.xml b/hadoop-common-project/hadoop-auth/pom.xml
index 89d54198fe..6eaa4fdfce 100644
--- a/hadoop-common-project/hadoop-auth/pom.xml
+++ b/hadoop-common-project/hadoop-auth/pom.xml
@@ -128,6 +128,15 @@
       <groupId>org.apache.zookeeper</groupId>
       <artifactId>zookeeper</artifactId>
     </dependency>
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.xerial.snappy</groupId>
+      <artifactId>snappy-java</artifactId>
+      <scope>provided</scope>
+    </dependency>
     <dependency>
       <groupId>org.apache.curator</groupId>
       <artifactId>curator-framework</artifactId>
diff --git a/hadoop-common-project/hadoop-common/pom.xml b/hadoop-common-project/hadoop-common/pom.xml
index f49a18398f..bcba228830 100644
--- a/hadoop-common-project/hadoop-common/pom.xml
+++ b/hadoop-common-project/hadoop-common/pom.xml
@@ -309,6 +309,10 @@
         </exclusion>
       </exclusions>
     </dependency>
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.zookeeper</groupId>
       <artifactId>zookeeper</artifactId>
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/ClientBaseWithFixes.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/ClientBaseWithFixes.java
index 666000b2f4..7650c9fbf8 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/ClientBaseWithFixes.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/ClientBaseWithFixes.java
@@ -41,7 +41,6 @@
 import org.apache.zookeeper.ZKTestCase;
 import org.apache.zookeeper.ZooKeeper;
 import org.apache.zookeeper.server.ServerCnxnFactory;
-import org.apache.zookeeper.server.ServerCnxnFactoryAccessor;
 import org.apache.zookeeper.server.ZKDatabase;
 import org.apache.zookeeper.server.ZooKeeperServer;
 import org.apache.zookeeper.server.persistence.FileTxnLog;
@@ -437,9 +436,7 @@ protected void stopServer() throws Exception {
 
 
     protected static ZooKeeperServer getServer(ServerCnxnFactory fac) {
-        ZooKeeperServer zs = ServerCnxnFactoryAccessor.getZkServer(fac);
-
-        return zs;
+        return fac.getZooKeeperServer();
     }
 
     protected void tearDownAll() throws Exception {
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/TestZKFailoverControllerStress.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/TestZKFailoverControllerStress.java
index bdbf1d9c2c..4dcc74b86d 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/TestZKFailoverControllerStress.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/TestZKFailoverControllerStress.java
@@ -23,6 +23,7 @@
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeys;
 import org.apache.hadoop.util.Time;
+import org.apache.zookeeper.server.ServerCnxn;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -131,7 +132,7 @@ public void testRandomHealthAndDisconnects() throws Exception {
     long st = Time.now();
     while (Time.now() - st < runFor) {
       cluster.getTestContext().checkException();
-      serverFactory.closeAll();
+      serverFactory.closeAll(ServerCnxn.DisconnectReason.SERVER_SHUTDOWN);
       Thread.sleep(50);
     }
   }
diff --git a/hadoop-common-project/hadoop-registry/pom.xml b/hadoop-common-project/hadoop-registry/pom.xml
index d9102d1d9d..171b722903 100644
--- a/hadoop-common-project/hadoop-registry/pom.xml
+++ b/hadoop-common-project/hadoop-registry/pom.xml
@@ -135,6 +135,17 @@
       <artifactId>dnsjava</artifactId>
     </dependency>
 
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>org.xerial.snappy</groupId>
+      <artifactId>snappy-java</artifactId>
+      <scope>provided</scope>
+    </dependency>
+
   </dependencies>
 
   <build>
diff --git a/hadoop-common-project/hadoop-registry/src/main/java/org/apache/hadoop/registry/server/services/MicroZookeeperService.java b/hadoop-common-project/hadoop-registry/src/main/java/org/apache/hadoop/registry/server/services/MicroZookeeperService.java
index 0ab4cd2f3b..994a2565c3 100644
--- a/hadoop-common-project/hadoop-registry/src/main/java/org/apache/hadoop/registry/server/services/MicroZookeeperService.java
+++ b/hadoop-common-project/hadoop-registry/src/main/java/org/apache/hadoop/registry/server/services/MicroZookeeperService.java
@@ -229,7 +229,7 @@ protected void serviceStart() throws Exception {
     setupSecurity();
 
     FileTxnSnapLog ftxn = new FileTxnSnapLog(dataDir, dataDir);
-    ZooKeeperServer zkServer = new ZooKeeperServer(ftxn, tickTime);
+    ZooKeeperServer zkServer = new ZooKeeperServer(ftxn, tickTime, "");
 
     LOG.info("Starting Local Zookeeper service");
     factory = ServerCnxnFactory.createFactory();
diff --git a/hadoop-hdfs-project/hadoop-hdfs-nfs/pom.xml b/hadoop-hdfs-project/hadoop-hdfs-nfs/pom.xml
index ab21583964..24599a2b24 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-nfs/pom.xml
+++ b/hadoop-hdfs-project/hadoop-hdfs-nfs/pom.xml
@@ -83,6 +83,16 @@ https://maven.apache.org/xsd/maven-4.0.0.xsd">
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.xerial.snappy</groupId>
+      <artifactId>snappy-java</artifactId>
+      <scope>provided</scope>
+    </dependency>
     <dependency>
       <groupId>org.apache.hadoop.thirdparty</groupId>
       <artifactId>hadoop-shaded-guava</artifactId>
diff --git a/hadoop-hdfs-project/hadoop-hdfs/pom.xml b/hadoop-hdfs-project/hadoop-hdfs/pom.xml
index 95ac71bae2..10d66d055b 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/pom.xml
+++ b/hadoop-hdfs-project/hadoop-hdfs/pom.xml
@@ -62,6 +62,16 @@ https://maven.apache.org/xsd/maven-4.0.0.xsd">
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.xerial.snappy</groupId>
+      <artifactId>snappy-java</artifactId>
+      <scope>provided</scope>
+    </dependency>
     <dependency>
       <groupId>org.apache.hadoop.thirdparty</groupId>
       <artifactId>hadoop-shaded-guava</artifactId>
diff --git a/hadoop-project/pom.xml b/hadoop-project/pom.xml
index c69ebcfdda..9ce429e85e 100644
--- a/hadoop-project/pom.xml
+++ b/hadoop-project/pom.xml
@@ -97,8 +97,8 @@
     <hadoop-thirdparty-shaded-protobuf-prefix>${hadoop-thirdparty-shaded-prefix}.protobuf</hadoop-thirdparty-shaded-protobuf-prefix>
     <hadoop-thirdparty-shaded-guava-prefix>${hadoop-thirdparty-shaded-prefix}.com.google.common</hadoop-thirdparty-shaded-guava-prefix>
 
-    <zookeeper.version>3.5.6</zookeeper.version>
-    <curator.version>4.2.0</curator.version>
+    <zookeeper.version>3.6.3</zookeeper.version>
+    <curator.version>5.2.0</curator.version>
     <findbugs.version>3.0.5</findbugs.version>
     <dnsjava.version>3.4.0</dnsjava.version>
 
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-mawo/hadoop-yarn-applications-mawo-core/pom.xml b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-mawo/hadoop-yarn-applications-mawo-core/pom.xml
index ed0f059905..2809c75ffd 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-mawo/hadoop-yarn-applications-mawo-core/pom.xml
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-mawo/hadoop-yarn-applications-mawo-core/pom.xml
@@ -104,6 +104,17 @@
       </exclusions>
     </dependency>
 
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>org.xerial.snappy</groupId>
+      <artifactId>snappy-java</artifactId>
+      <scope>provided</scope>
+    </dependency>
+
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/pom.xml b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/pom.xml
index 2c5749cf2f..b7ec64934c 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/pom.xml
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/pom.xml
@@ -102,6 +102,16 @@
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.xerial.snappy</groupId>
+      <artifactId>snappy-java</artifactId>
+      <scope>provided</scope>
+    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/pom.xml b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/pom.xml
index 435254dbda..9b61479528 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/pom.xml
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/pom.xml
@@ -109,6 +109,15 @@
       <groupId>org.apache.zookeeper</groupId>
       <artifactId>zookeeper</artifactId>
     </dependency>
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.xerial.snappy</groupId>
+      <artifactId>snappy-java</artifactId>
+      <scope>provided</scope>
+    </dependency>
     <dependency>
       <groupId>${leveldbjni.group}</groupId>
       <artifactId>leveldbjni-all</artifactId>
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/pom.xml b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/pom.xml
index 485da711cc..deae04ad2b 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/pom.xml
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/pom.xml
@@ -203,6 +203,15 @@
       <groupId>org.apache.zookeeper</groupId>
       <artifactId>zookeeper</artifactId>
     </dependency>
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.xerial.snappy</groupId>
+      <artifactId>snappy-java</artifactId>
+      <scope>provided</scope>
+    </dependency>
     <dependency>
       <groupId>${leveldbjni.group}</groupId>
       <artifactId>leveldbjni-all</artifactId>