invalid internal transport message format, got (0,0,0,a7)， 偶尔会报一下。

环境 ：es版本：6.0.1， docker 17.04-ce, jvm :1.8.0_151-b12。内存、磁盘足够用。网卡流量未满
 [2017-12-20T03:32:04,241][WARN ][o.e.t.n.Netty4Transport ] [node-1] exception caught on transport layer [[id: 0xdab90e5e, L:/10.100.45.20:9300 ! R:/10.100.159.125:54968]], closing connection
io.netty.handler.codec.DecoderException: java.io.StreamCorruptedException: invalid internal transport message format, got (0,0,0,a7)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:459) ~[netty-codec-4.1.13.Final.jar:4.1.13.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:392) ~[netty-codec-4.1.13.Final.jar:4.1.13.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:359) ~[netty-codec-4.1.13.Final.jar:4.1.13.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:342) ~[netty-codec-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:75) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.handler.logging.LoggingHandler.channelInactive(LoggingHandler.java:167) [netty-handler-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1329) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:908) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:744) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) [netty-common-4.1.13.Final.jar:4.1.13.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403) [netty-common-4.1.13.Final.jar:4.1.13.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:462) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [netty-common-4.1.13.Final.jar:4.1.13.Final]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.io.StreamCorruptedException: invalid internal transport message format, got (0,0,0,a7)
at org.elasticsearch.transport.TcpTransport.validateMessageHeader(TcpTransport.java:1267) ~[elasticsearch-6.0.1.jar:6.0.1]
at org.elasticsearch.transport.netty4.Netty4SizeHeaderFrameDecoder.decode(Netty4SizeHeaderFrameDecoder.java:36) ~[?:?]
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:489) ~[?:?]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:428) ~[?:?]
... 24 more