Upgrade Netty 3.10.4

Author: slandelle

pom.xml

@@ -533,7 +533,7 @@
         <additionalparam>-Xdoclint:none</additionalparam>
         <distMgmtSnapshotsUrl>http://oss.sonatype.org/content/repositories/snapshots</distMgmtSnapshotsUrl>
         <surefire.redirectTestOutputToFile>true</surefire.redirectTestOutputToFile>
-        <netty.version>3.10.3.Final</netty.version>
+        <netty.version>3.10.4.Final</netty.version>
         <grizzly.version>2.3.21</grizzly.version>
         <maven.compiler.source>1.7</maven.compiler.source>
         <maven.compiler.target>1.7</maven.compiler.target>

src/main/java/com/ning/http/client/providers/netty/request/NettyConnectListener.java

@@ -115,7 +115,9 @@ private void onFutureFailure(Channel channel, Throwable cause) {
         abortChannelPreemption();
 
         boolean canRetry = future.canRetry();
-        LOGGER.debug("Trying to recover from failing to connect channel {} with a retry value of {} ", channel, canRetry);
+        if (LOGGER.isDebugEnabled()) {
+            LOGGER.debug("Trying to recover from failing to connect channel " + channel + " with a retry value of " + canRetry, cause);
+        }
         if (canRetry
                 && cause != null
                 && (future.getState() != NettyResponseFuture.STATE.NEW || StackTraceInspector.recoverOnDisconnectException(cause))) {