I've just tried this with Apache2 as well and I'm getting the same random
truncations. Maybe this is a gRPC issue?
On Monday, November 22, 2021 at 1:13:10 PM UTC-5 Paul Cote wrote:
> Hello,
>
> I've been struggling to resolve this particular issue. I have a Golang
> gRPC server which streams data to a Flask/Gunicorn webserver and then
> passes it on to the client. I have Nginx running as a reverse proxy in
> front of my webserver
>
> Client(Browser) <-> Nginx Reverse Proxy <-> Webserver(Flask/Gunicorn)
> <-> go-grpc server
>
> Essentially, the user on their browser will click a button which is just
> an AJAX call (/stream) to the backend webserver. Then the webserver, which
> is the gRPC client, will make the actual gRPC call and yield all responses
> back to the client. Some of them get truncated. For example if we expect:
>
> {
> "source": "serviceA",
> "timestamp": 123490435,
> "data": {
> "1": 3446.706,
> "2": -45.343464,
> ...
> "200": 5.3545
> }
> }
>
> We may only get:
> {
> "source": "serviceA",
> "ti
>
> And then:
> mestamp": 123490435,
> "data": {
> "1": 3446.706,
> "2": -45.343464,
> ...
> "200": 5.3545
> }
> }
> In the next frame. Where the truncation happens is random and when it
> happens is also random. If my setup doesn't make any sense, please let me
> know on better ways to integrate a gRPC client.
>
> I've isolated the problem to nginx. If I run this without nginx, I get no
> truncations. I've tried `proxy_buffering off;` and a myriad other nginx
> paramters but nothing seems to work.
>
> Thank you,
>
> Paul C.
>
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