fuzhibo

It seems that the connection has lost ACK when sending to or reciving from the node. Not all ACK lost, just some of them. these ACK retransmisson also lost.

for more invention, I doubt the issue maybe caused by centos 8. I install Calico, the problem also happend. All I can think of the possibility of the issue is...

It seems worked for me, thank you @kallisti5. However, in CentOS 8, the issue can reproduced more easily.