diff --git a/rosjava/src/main/java/org/ros/internal/transport/queue/IncomingMessageQueue.java b/rosjava/src/main/java/org/ros/internal/transport/queue/IncomingMessageQueue.java
index f87672fc6dc90a934399c11c8e7fcc85b22129a2..d81d1803465901e05a53f966b52a99fab8444692 100644
--- a/rosjava/src/main/java/org/ros/internal/transport/queue/IncomingMessageQueue.java
+++ b/rosjava/src/main/java/org/ros/internal/transport/queue/IncomingMessageQueue.java
@@ -37,14 +37,14 @@ public class IncomingMessageQueue<T> {
    * {@link IncomingMessageQueue#addListener(MessageListener, int)} which are
    * consumed by user provided {@link MessageListener}s.
    */
-  private static final int QUEUE_CAPACITY = 16;
+  private static final int DEQUE_CAPACITY = 16;
 
   private final MessageReceiver<T> messageReceiver;
   private final MessageDispatcher<T> messageDispatcher;
 
   public IncomingMessageQueue(MessageDeserializer<T> deserializer, ExecutorService executorService) {
     CircularBlockingDeque<LazyMessage<T>> lazyMessages =
-        new CircularBlockingDeque<LazyMessage<T>>(QUEUE_CAPACITY);
+        new CircularBlockingDeque<LazyMessage<T>>(DEQUE_CAPACITY);
     messageReceiver = new MessageReceiver<T>(lazyMessages, deserializer);
     messageDispatcher = new MessageDispatcher<T>(lazyMessages, executorService);
     executorService.execute(messageDispatcher);
diff --git a/rosjava/src/main/java/org/ros/internal/transport/queue/OutgoingMessageQueue.java b/rosjava/src/main/java/org/ros/internal/transport/queue/OutgoingMessageQueue.java
index 5163a17643f087dc61ace7f8057587dcc56043a9..f9f3f8c378728ad7dd11c1dad76c359f79d8f107 100644
--- a/rosjava/src/main/java/org/ros/internal/transport/queue/OutgoingMessageQueue.java
+++ b/rosjava/src/main/java/org/ros/internal/transport/queue/OutgoingMessageQueue.java
@@ -42,10 +42,10 @@ public class OutgoingMessageQueue<T> {
   private static final boolean DEBUG = false;
   private static final Log log = LogFactory.getLog(OutgoingMessageQueue.class);
 
-  private static final int QUEUE_CAPACITY = 16;
+  private static final int DEQUE_CAPACITY = 16;
 
   private final MessageSerializer<T> serializer;
-  private final CircularBlockingDeque<T> queue;
+  private final CircularBlockingDeque<T> deque;
   private final ChannelGroup channelGroup;
   private final Writer writer;
   private final MessageBufferPool messageBufferPool;
@@ -57,7 +57,7 @@ public class OutgoingMessageQueue<T> {
   private final class Writer extends CancellableLoop {
     @Override
     public void loop() throws InterruptedException {
-      T message = queue.takeFirst();
+      T message = deque.takeFirst();
       final ChannelBuffer buffer = messageBufferPool.acquire();
       serializer.serialize(message, buffer);
       if (DEBUG) {
@@ -79,7 +79,7 @@ public class OutgoingMessageQueue<T> {
 
   public OutgoingMessageQueue(MessageSerializer<T> serializer, ExecutorService executorService) {
     this.serializer = serializer;
-    queue = new CircularBlockingDeque<T>(QUEUE_CAPACITY);
+    deque = new CircularBlockingDeque<T>(DEQUE_CAPACITY);
     channelGroup = new DefaultChannelGroup();
     writer = new Writer();
     messageBufferPool = new MessageBufferPool();
@@ -101,7 +101,7 @@ public class OutgoingMessageQueue<T> {
    *          the message to add to the queue
    */
   public void add(T message) {
-    queue.addLast(message);
+    deque.addLast(message);
     setLatchedMessage(message);
   }
 
diff --git a/rosjava/src/main/java/org/ros/namespace/NameResolver.java b/rosjava/src/main/java/org/ros/namespace/NameResolver.java
index b12af1fe9dbd8432d103c8827c3161afc3adeab2..e087b65cf9f167acd7d5e371bf6fd7c45ac1017a 100644
--- a/rosjava/src/main/java/org/ros/namespace/NameResolver.java
+++ b/rosjava/src/main/java/org/ros/namespace/NameResolver.java
@@ -75,7 +75,7 @@ public class NameResolver {
   public GraphName resolve(GraphName namespace, GraphName name) {
     GraphName remappedNamespace = lookUpRemapping(namespace);
     if (!remappedNamespace.isGlobal()) {
-      throw new IllegalStateException(String.format(
+      throw new IllegalArgumentException(String.format(
           "Namespace %s (remapped from %s) must be global.", remappedNamespace, namespace));
     }
     GraphName remappedName = lookUpRemapping(name);