Netty Unexpected exception from downstream ?

Question

2021-03-02 17:39:53,730-[TS] ERROR nioEventLoopGroup-3-7 com.sciyon.inter.netty.server.TCPServerHandler - Unexpected exception from downstream.
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:225)
    at sun.nio.ch.IOUtil.read(IOUtil.java:193)
    at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:375)
    at io.netty.buffer.UnpooledUnsafeDirectByteBuf.setBytes(UnpooledUnsafeDirectByteBuf.java:357)
    at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:898)
    at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:242)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:119)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:485)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:399)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:371)
    at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)
    at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
    at java.lang.Thread.run(Thread.java:724)

Answer 1

连接双方有一方断开