Uptick of FLOW_CONTROL_ERROR errors in CI after updating to 1.66.0 about grpc-go HOT 3 CLOSED

I'm going to close this out until we have more info here. It's possible our tests aren't cleaning up properly.

from grpc-go.

Hi stanhu@, it difficult to find a root cause with the limited information. I have a few questions to understand the issue better:

1. Did rolling back the server to gRPC Go 1.65 resolve the issue?
2. What are the kind of tests are you running? What is the network setup? For example, are client and server on the same machine/k8s pod/k8s cluster?
3. How much did the error rate deviate from usual? Was it a one time occurrence or was the uptick constant?
4. Did you see any increase in CPU/memory usage or performance degradation of the server that could indicate it was under high load?

from grpc-go.

Also, if you can provide a way to repro the issue, investigation would become much easier.

from grpc-go.