插座io什么时候是java。木卫一。IOException:对等方使用Netty引发的连接重置？

Question

当我使用netty向Web服务器发送请求时。我得到以下例外。什么会导致此异常

java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[na:1.7.0_25]
        at sun.nio.ch.SocketDispatcher.read(Unknown Source) ~[na:1.7.0_25]
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source) ~[na:1.7.0_25]
        at sun.nio.ch.IOUtil.read(Unknown Source) ~[na:1.7.0_25]
        at sun.nio.ch.SocketChannelImpl.read(Unknown Source) ~[na:1.7.0_25]
        at io.netty.buffer.UnpooledHeapByteBuf.setBytes(UnpooledHeapByteBuf.java:237) ~[netty-all-4.0.6.Final.jar:na]
        at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:867) ~[netty-all-4.0.6.Final.jar:na]
        at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:227) ~[netty-all-4.0.6.Final.jar:na]
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:87) ~[netty-all-4.0.6.Final.jar:na]
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:497) ~[netty-all-4.0.6.Final.jar:na]
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:465) ~[netty-all-4.0.6.Final.jar:na]
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:359) ~[netty-all-4.0.6.Final.jar:na]
        at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) ~[netty-all-4.0.6.Final.jar:na]
        at java.lang.Thread.run(Unknown Source) ~[na:1.7.0_25]

Answer 1

在读取之前尝试检查并捕获异常。它帮助我摆脱了那个例外

// Attempt to read off the channel
        int numRead;
        try {
            numRead = socketChannel.read(this.readBuffer);
        } catch (IOException e) {
            // The remote forcibly closed the connection, cancel
            // the selection key and close the channel.
            key.cancel();
            socketChannel.close();
            return;
        }

Answer 2

此错误的常见原因是您已写入另一端已关闭的连接。换句话说，应用程序协议错误。还有其他原因，但这是最常见的

NB Netty与此无关