flume启动报错：java.nio.channels.ClosedChannelException

flume报错：java.nio.channels.ClosedChannelException

1. 报错日志信息

java.nio.channels.ClosedChannelException
	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.cleanUpWriteBuffer(AbstractNioWorker.java:433)
	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.writeFromUserCode(AbstractNioWorker.java:128)
	at org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink.handleAcceptedSocket(NioServerSocketPipelineSink.java:99)
	at org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink.eventSunk(NioServerSocketPipelineSink.java:36)
	at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendDownstream(DefaultChannelPipeline.java:779)
	at org.jboss.netty.channel.Channels.write(Channels.java:725)
	at org.jboss.netty.channel.Channels.write(Channels.java:686)
	at org.jboss.netty.handler.codec.compression.ZlibEncoder.finishEncode(ZlibEncoder.java:390)
	at org.jboss.netty.handler.codec.compression.ZlibEncoder.handleDownstream(ZlibEncoder.java:326)
	at org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:591)
	at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendDownstream(DefaultChannelPipeline.java:784)
	at org.jboss.netty.handler.codec.oneone.OneToOneEncoder.handleDownstream(OneToOneEncoder.java:54)
	at org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:591)
	at org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:582)
	at org.jboss.netty.channel.Channels.close(Channels.java:812)
	at org.jboss.netty.channel.AbstractChannel.close(AbstractChannel.java:205)
	at org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.channelClosed(NettyServer.java:212)
	at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
	at org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.handleUpstream(NettyServer.java:173)
	at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.jboss.netty.handler.codec.frame.FrameDecoder.cleanup(FrameDecoder.java:493)
	at org.jboss.netty.handler.codec.frame.FrameDecoder.channelClosed(FrameDecoder.java:371)
	at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
	at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.jboss.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:60)
	at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
	at org.jboss.netty.channel.Channels.fireChannelClosed(Channels.java:468)
	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.close(AbstractNioWorker.java:375)
	at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:93)
	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
	at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
	at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
	at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

2. 问题排查
   查看源码可以发现这么一点注释说明：

   /**
   * Checked exception thrown when an attempt is made to invoke or complete an
   * I/O operation upon channel that is closed, or at least closed to that
   * operation.  That this exception is thrown does not necessarily imply that
   * the channel is completely closed.  A socket channel whose write half has
   * been shut down, for example, may still be open for reading.
   *
   * @since 1.4
   */
   

   也就是说该异常获取对数据传输的影响不是很大，而且，实际生产环境中，的确发现该报错不停的产生，但是数据传输没有发生明显的缺失现象