title: GCP GKE cluster node throws {"unmanaged": {"fs.aio-nr": "2272", "net.ipv4.tcp_fastopen_key"
body: <p>I recently installed on GKE <a href="https://github.com/infracloudio/botkube" rel="noreferrer">Botkube</a> and it started showing error of <a href="https://i.stack.imgur.com/SSBlh.png" rel="noreferrer"><img src="https://i.stack.imgur.com/SSBlh.png" alt="enter image description here" /></a>
  does anyone have any idea how to approach that issue or what would that mean ? I've read on <a href="https://en.wikipedia.org/wiki/TCP_Fast_Open" rel="noreferrer">wikipedia</a> on how fastopen helps to make client-server connection quicker on second re-try skiping the 3 way syn-ack but what could this error mean ?</p>