IdleStateAwareChannelHandler.channelDisconnected(...) is not called intermittently

[Daniel Ferber]

After debugging, I noticed that the channelDisconnected() and
channelUnbound() events are never called on the pipeline as shown in the
NioWorker class below.

What could be the reason that the channel is not set as connected nor bound?
(debugger accuses that channel.setClosed()== true; but connected==false and
bound==false).

void NioWorker.close(NioSocketChannel channel, ChannelFuture future) {
        boolean connected = channel.isConnected();
        boolean bound = channel.isBound();
        try {
            channel.socket.close();
            cancelledKeys ++;

            if (channel.setClosed()) {
                future.setSuccess();
                if (connected) {
                    fireChannelDisconnected(channel);
                }
                if (bound) {
                    fireChannelUnbound(channel);
                }

                cleanUpWriteBuffer(channel);
                fireChannelClosed(channel);
            } else {
                future.setSuccess();
            }
        } catch (Throwable t) {
            future.setFailure(t);
            fireExceptionCaught(channel, t);
        }
    }

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