/*
 * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
 * (the "License"). You may not use this work except in compliance with the License, which is
 * available at www.apache.org/licenses/LICENSE-2.0
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied, as more fully set forth in the License.
 *
 * See the NOTICE file distributed with this work for information regarding copyright ownership.
 */

package alluxio.worker.netty;

import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.timeout.IdleState;
import io.netty.handler.timeout.IdleStateEvent;

/**
 * Closes the channel if it has been idle for too long.
 */
public class IdleReadHandler extends ChannelDuplexHandler {
  /**
   * Creates a new idle read handler.
   */
  public IdleReadHandler() {}

  @Override
  public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
    if (evt instanceof IdleStateEvent) {
      if (((IdleStateEvent) evt).state() == IdleState.READER_IDLE) {
        ctx.close();
      }
    }
  }
}

@@ -721,16 +721,73 @@
 teEvent;
+%0Aimport org.slf4j.Logger;%0Aimport org.slf4j.LoggerFactory;
 %0A%0A/**%0A *
@@ -904,16 +904,101 @@
 ndler %7B%0A
+  private static final Logger LOG = LoggerFactory.getLogger(IdleReadHandler.class);%0A%0A
   /**%0A  
@@ -1210,24 +1210,24 @@
 ateEvent) %7B%0A
-
       if (((
@@ -1279,24 +1279,123 @@
 DER_IDLE) %7B%0A
+        LOG.warn(%22Closing netty channel to %7B%7D due to inactivity.%22, ctx.channel().remoteAddress());%0A
         ctx.

Add logging when netty channels are closed due to inactivity.