EpollServerSocketChannel always return 0 for binding to port 0?

[Reynold Xin]

I'm testing EpollServerSocketChannel and found that the port returned by it after binding is always 0. Is this expected? This is with Netty 4.0.17-Final

val bossGroup = new io.netty.channel.epoll.EpollEventLoopGroup(1)

val workerGroup = new io.netty.channel.epoll.EpollEventLoopGroup(0)

val bootstrap = new io.netty.bootstrap.ServerBootstrap

bootstrap.group(bossGroup, workerGroup).channel(classOf[io.netty.channel.epoll.EpollServerSocketChannel]).childHandler(new io.netty.channel.ChannelInitializer[io.netty.channel.socket.SocketChannel] {

      override def initChannel(ch: io.netty.channel.socket.SocketChannel): Unit = {

      }

    })

val cf = bootstrap.bind(new java.net.InetSocketAddress(12345))

cf.sync()

println("local address is " + cf.channel.localAddress)

This always prints "local address is 0.0.0.0/0.0.0.0:0"

If I replace Epoll with Nio, the output works:

val bossGroup = new io.netty.channel.nio.NioEventLoopGroup(1)

val workerGroup = new io.netty.channel.nio.NioEventLoopGroup(0)

val bootstrap = new io.netty.bootstrap.ServerBootstrap

bootstrap.group(bossGroup, workerGroup).channel(classOf[io.netty.channel.socket.nio.NioServerSocketChannel]).childHandler(new io.netty.channel.ChannelInitializer[io.netty.channel.socket.SocketChannel] {

      override def initChannel(ch: io.netty.channel.socket.SocketChannel): Unit = {

      }

    })

val cf = bootstrap.bind(new java.net.InetSocketAddress(0))

cf.sync()

println("local address is " + cf.channel.localAddress)

local address is /0:0:0:0:0:0:0:0:44569

[Norman Maurer]

Hey Reynold,

this was fixed in a later release. So upgrade to latest stable should fix this for you.

-- 
Norman Maurer

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[Reynold Xin]

Thanks. Will give the latest release a try.

[Norman Maurer]

Let us know if you have any issues