Hello!

On Sun, Jun 17, 2018 at 12:46:35PM -0400, peanutgyz wrote:

> when grpc server response
> SETTINGS[0], WINDOW_UPDATE[0], PING[0], HEADERS[1], DATA[1], HEADERS[1] in
> one tcp packet,
>
> nginx want to send settings ack and call function
> ngx_http_grpc_send_settings_ack, write some data in ctx->out
>
> when finalize upstream grpc request, because out != NULL, nginx can't set
> connection to be keepalive and closed connection.
>
> expect connection to be persistent .

There are situations when nginx won't be able to keep a connection
alive. These aren't likely to happen though, and not considered
to be a problem.

--
Maxim Dounin
http://mdounin.ru/
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