elasticsearch在启动后出现[transport.netty][solr001] exception caught on transport layer[[[id:0x2d16759]]

elasticsearch在启动后出现如下错误：

[2019-04-18T09:29:57,850][WARN ][o.e.t.n.Netty4Transport  ] [xHaZmSP] exception caught on transport layer [[id: 0xe6246f88, L:/127.0.0.1:9300 - R:/127.0.0.1:9493]], closing connection
java.io.IOException: 杩滅▼涓绘満寮鸿揩鍏抽棴浜嗕竴涓幇鏈夌殑杩炴帴銆?  -----这是乱码不用管
        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-4.1.13.Final.jar:4.1.13.Final]
        at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1100) ~[netty-buffer-4.1.13.Final.jar:4.1.13.Final]
        at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:372) ~[netty-transport-4.1.13.Final.jar:4.1.13.Final]
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:123) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:644) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:544) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:498) [netty-transport-4.1.13.Final.jar:4.1.13.Final]
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:458) [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:745) [?:1.8.0_66]

1、原因：防火墙拦截

2、解决方法：关闭防火墙。