elasticsearch中的java.io.IOException: 远程主机强迫关闭了一个现有的连接
[2018-07-31T14:29:41,289][WARN ][o.e.x.s.t.n.SecurityNetty4HttpServerTransport] [9rTGh-y] caught exception while handling client http traffic, closing connection [id: 0x2a6c7a87, L:/127.0.0.1:9200 - R:/127.0.0.1:57233]
java.io.IOException: 您的主机中的软件中止了一个已建立的连接。
at sun.nio.ch.SocketDispatcher.read0(Native Method) ~[?:?]
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43) ~[?:?]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[?:?]
at sun.nio.ch.IOUtil.read(IOUtil.java:197) ~[?:?]
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380) ~[?:?]
at io.netty.buffer.PooledHeapByteBuf.setBytes(PooledHeapByteBuf.java:261) ~[netty-buffer-4.1.16.Final.jar:4.1.16.Final]
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1106) ~[netty-buffer-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:343) ~[netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:123) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:545) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:499) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [netty-common-4.1.16.Final.jar:4.1.16.Final]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_152]
===============
出现这个错误说明client端主动放弃了链接(abort connection)， 要看一下是否客户端访问ES集群的时候，是否应用层面做了查询超时一类的控制，从而因为某些查询比较慢，客户端主动放弃了，导致网络链接没有正常关闭。
解决办法：1.重启elasticSearch服务
2.修改kibana requesttimeout参数
3.更好的方法待发现
