diff --git a/hadoop-common-project/hadoop-auth/pom.xml b/hadoop-common-project/hadoop-auth/pom.xml
index 4363556e0d..07af62873f 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 c097a68c7d..a04517c17a 100644
--- a/hadoop-common-project/hadoop-common/pom.xml
+++ b/hadoop-common-project/hadoop-common/pom.xml
@@ -310,6 +310,10 @@
         </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 783969637e..6ae5a91a27 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-hdfs-project/hadoop-hdfs-nfs/pom.xml b/hadoop-hdfs-project/hadoop-hdfs-nfs/pom.xml
index 532194e2c7..1c8e8c7cd8 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-nfs/pom.xml
+++ b/hadoop-hdfs-project/hadoop-hdfs-nfs/pom.xml
@@ -84,6 +84,16 @@ http://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>com.google.guava</groupId>
       <artifactId>guava</artifactId>
diff --git a/hadoop-hdfs-project/hadoop-hdfs/pom.xml b/hadoop-hdfs-project/hadoop-hdfs/pom.xml
index aceb9c5d25..f6dff17d61 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/pom.xml
+++ b/hadoop-hdfs-project/hadoop-hdfs/pom.xml
@@ -78,11 +78,26 @@ http://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>com.google.guava</groupId>
       <artifactId>guava</artifactId>
       <scope>compile</scope>
     </dependency>
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+      <scope>provided</scope>
+    </dependency>
     <dependency>
       <groupId>org.eclipse.jetty</groupId>
       <artifactId>jetty-util-ajax</artifactId>
diff --git a/hadoop-project/pom.xml b/hadoop-project/pom.xml
index 960cb17345..316d61e327 100644
--- a/hadoop-project/pom.xml
+++ b/hadoop-project/pom.xml
@@ -86,8 +86,8 @@
     <protobuf.version>2.5.0</protobuf.version>
     <protoc.path>${env.HADOOP_PROTOC_PATH}</protoc.path>
 
-    <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>3.0.0</findbugs.version>
     <spotbugs.version>3.1.0-RC1</spotbugs.version>
     <dnsjava.version>2.1.7</dnsjava.version>
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 5962e390c5..be30da3a4d 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/pom.xml
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/pom.xml
@@ -79,6 +79,16 @@
       <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-registry/src/main/java/org/apache/hadoop/registry/server/services/MicroZookeeperService.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/services/MicroZookeeperService.java
index a7e2611b3d..9ede9c616d 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/services/MicroZookeeperService.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-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-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 6deecc3d4c..2a0eb6f35e 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
@@ -103,6 +103,15 @@
       <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.fusesource.leveldbjni</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 701cfbec7c..6b42417a88 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
@@ -224,6 +224,15 @@
       <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.fusesource.leveldbjni</groupId>
       <artifactId>leveldbjni-all</artifactId>