nginx sometimes close connection to grpc upstream when keepalive is set

[peanutgyz]

thanks for your help.


how can i find why nginx can't keep connection in this case.

why nginx can no process data and send a settings or ping ack to grpc
server?

grpc client will do like this.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,280159,280207#msg-280207