diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/BufferedMutatorImpl.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/BufferedMutatorImpl.java
index c772b782db7..b91038d0073 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/BufferedMutatorImpl.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/BufferedMutatorImpl.java
@@ -73,7 +73,7 @@ public class BufferedMutatorImpl implements BufferedMutator {
    * The {@link ConcurrentLinkedQueue#size()} is NOT a constant-time operation.
    */
   private final AtomicInteger undealtMutationCount = new AtomicInteger(0);
-  private volatile long writeBufferSize;
+  private final long writeBufferSize;
   private final int maxKeyValueSize;
   private final ExecutorService pool;
   private final AtomicInteger rpcTimeout;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
index 2ea7c74f173..ef054b6a466 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
@@ -227,7 +227,7 @@ public class HBaseAdmin implements Admin {
 
   private ClusterConnection connection;
 
-  private volatile Configuration conf;
+  private final Configuration conf;
   private final long pause;
   private final int numRetries;
   private final int syncWaitTimeout;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ZKNamespaceManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ZKNamespaceManager.java
index de21ce082d5..9e228ad40c8 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ZKNamespaceManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ZKNamespaceManager.java
@@ -51,7 +51,7 @@ import java.util.concurrent.ConcurrentSkipListMap;
 public class ZKNamespaceManager extends ZKListener {
   private static final Log LOG = LogFactory.getLog(ZKNamespaceManager.class);
   private final String nsZNode;
-  private volatile NavigableMap<String,NamespaceDescriptor> cache;
+  private final NavigableMap<String,NamespaceDescriptor> cache;
 
   public ZKNamespaceManager(ZKWatcher zkw) throws IOException {
     super(zkw);