Question

我正在尝试使用NioUdtMessageConnectorChannel作为通道创建用于接收UDP消息的服务器。粘贴服务器的代码

EventLoopGroup group = new NioEventLoopGroup(50,
                Executors.defaultThreadFactory());


    try {
        Bootstrap b = new Bootstrap();
        b.group(group);
        b.channel(NioUdtMessageConnectorChannel.class);
        b.option(UdtChannelOption.SO_BROADCAST, true);
        b.option(UdtChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, 1024);
        b.option(UdtChannelOption.PROTOCOL_RECEIVE_BUFFER_SIZE, 1024);
        b.option(UdtChannelOption.PROTOCOL_SEND_BUFFER_SIZE, 1024);
        b.option(UdtChannelOption.TCP_NODELAY, true);
        b.option(UdtChannelOption.SO_RCVBUF, 256 * 1024);
        b.handler(new SNMPTrapHandler());
        b.bind(PORT).sync().channel().closeFuture().await();
    } finally {
        group.shutdownGracefully();
    }

但是，我收到了以下错误

log4j:WARN Please initialize the log4j system properly.
java.nio.channels.IllegalSelectorException
    at sun.nio.ch.SelectorImpl.register(Unknown Source)
    at java.nio.channels.spi.AbstractSelectableChannel.register(Unknown Source)
    at io.netty.channel.nio.AbstractNioChannel.doRegister(AbstractNioChannel.java:308)
    at io.netty.channel.AbstractChannel$AbstractUnsafe.register0(AbstractChannel.java:439)
    at io.netty.channel.AbstractChannel$AbstractUnsafe.access$100(AbstractChannel.java:374)
    at io.netty.channel.AbstractChannel$AbstractUnsafe$1.run(AbstractChannel.java:418)
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:354)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:353)
    at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101)
    at java.lang.Thread.run(Unknown Source)

确切错误是什么？

Answer 1

创建NioEventLoopGroup时必须指定UDT选择器提供程序。例如：

new NioEventLoopGroup(..., NioUdtProvider.MESSAGE_PROVIDER);

有关详细信息，请参阅the UDT examples。

在Netty 4.0.15中，java.nio.channels.IllegalSelectorException异常

1 个答案: