in impl/src/main/java/org/apache/rocketmq/remoting/impl/netty/NettyRemotingClient.java [180:187]
public void invokeOneWay(final String address, final RemotingCommand request) {
final Channel channel = this.clientChannelManager.createIfAbsent(address);
if (channel != null && channel.isActive()) {
this.invokeOnewayWithInterceptor(channel, request);
} else {
this.clientChannelManager.closeChannel(address, channel);
}
}