Shutdown process is slow, 3 seconds, even when the client is not used at all. I wonder what prevent immediate shutdown.

asyncHttpClient(config()  .setConnectTimeout(5_000)  .setRequestTimeout(20_000))

So I guess this is the shutdown logic:

// ChannelManagerpublicvoidclose() {if (allowReleaseEventLoopGroup) {eventLoopGroup              .shutdownGracefully(config.getShutdownQuietPeriod(),config.getShutdownTimeout(),TimeUnit.MILLISECONDS)              .addListener(future ->doClose());    }else {doClose();    }  }

And I understand if I want to force faster shutdown I can pass a small value tosetShutdownTimeout() builder function, but still I don't know why shutdown takes long when there was no interaction, even after close function was called.
Not sure if it is a bug or a good reason behind it.
Thanks :)