diff --git a/core/src/main/java/org/elasticsearch/action/admin/cluster/health/ClusterIndexHealth.java b/core/src/main/java/org/elasticsearch/action/admin/cluster/health/ClusterIndexHealth.java
index bd65211d2d3..5637871547e 100644
--- a/core/src/main/java/org/elasticsearch/action/admin/cluster/health/ClusterIndexHealth.java
+++ b/core/src/main/java/org/elasticsearch/action/admin/cluster/health/ClusterIndexHealth.java
@@ -23,7 +23,6 @@ import com.google.common.collect.Maps;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
 import org.elasticsearch.cluster.routing.IndexRoutingTable;
 import org.elasticsearch.cluster.routing.IndexShardRoutingTable;
-import org.elasticsearch.cluster.routing.ShardRouting;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.Streamable;
@@ -33,7 +32,6 @@ import org.elasticsearch.common.xcontent.XContentBuilderString;
 
 import java.io.IOException;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
diff --git a/core/src/main/java/org/elasticsearch/bootstrap/JNAKernel32Library.java b/core/src/main/java/org/elasticsearch/bootstrap/JNAKernel32Library.java
index a500e1784dd..17923433ba0 100644
--- a/core/src/main/java/org/elasticsearch/bootstrap/JNAKernel32Library.java
+++ b/core/src/main/java/org/elasticsearch/bootstrap/JNAKernel32Library.java
@@ -86,7 +86,7 @@ class JNAKernel32Library {
     }
 
     List<Object> getCallbacks() {
-        return Collections.unmodifiableList(new ArrayList<Object>(callbacks));
+        return Collections.<Object>unmodifiableList(callbacks);
     }
 
     /**
diff --git a/core/src/main/java/org/elasticsearch/transport/netty/NettyTransport.java b/core/src/main/java/org/elasticsearch/transport/netty/NettyTransport.java
index de7f91aa094..fdf2552eb41 100644
--- a/core/src/main/java/org/elasticsearch/transport/netty/NettyTransport.java
+++ b/core/src/main/java/org/elasticsearch/transport/netty/NettyTransport.java
@@ -1107,7 +1107,7 @@ public class NettyTransport extends AbstractLifecycleComponent<Transport> implem
             newAllChannels.addAll(Arrays.asList(reg));
             newAllChannels.addAll(Arrays.asList(state));
             newAllChannels.addAll(Arrays.asList(ping));
-            this.allChannels = Collections.unmodifiableList(allChannels);
+            this.allChannels = Collections.unmodifiableList(allChannels );
         }
 
         public boolean hasChannel(Channel channel) {