Another java.util.concurrent.TimeoutException problem analysis

[vongosling]

We implements SocketIo server using netty, but make some minor difference with socketIO sepc.That's in one step, after returning http connection result,I closed this socket using ChannelFutureListener intendedly.so when I using AndroidAysnc lib,I got TimeoutException, through debug code ,I found in AysncSocketMiddleware's recycleSocket method:

       sockets.add(socket);

this line is not working well in my situation,and I could not get SocketException, in my socket programming experience,usually i will using "socket.sendUrgentData(0xFF)" to verify one socket is really available(If not,throw SocketException).so the problem occurs in the socket reusing situation,the solution is also obvious:Verify socket is available before writing some data .meanwhile, let's customer know server closed socket actively