[Bug]: Operation based sampling strategies are not being returned for ratelimiting service strategies about jaeger HOT 6 OPEN

Sorry, I don't understand the issue, as you keep talking about unit tests. Please describe the use case, show configuration used, and explain what behavior you are expecting and getting instead.

from jaeger.

Sorry, I'll try to elaborate.

I originally wanted to solve an issue in OpenTelemetry SDK - open-telemetry/opentelemetry-java#5504, which used the following strategies_sampling.json:

{
  "service_strategies": [
    {
      "service": "foobar",
      "type": "ratelimiting",
      "param": 2
    }
  ],
  "default_strategy": {
    "type": "probabilistic",
    "param": 0.2,
    "operation_strategies": [
      {
        "operation": "/metrics",
        "type": "probabilistic",
        "param": 0.0
      }
    ]
  }
}

I made a small java service and added OTEL tooling with all-in-one Jaeger backend and local console output for simplicity sake - https://github.com/kuujis/opentelemetry-java-5504. There are commands to build and run images, which should make the problem clear(er?) if someone feels like checking it out.

What I observed after some debugging is that GetSamplingStrategy gRCP call from OTEL towards Jaeger all-in-one app does not return the default strategies, which should be applied to specific operation ("/metrics" in the example above) IF the service sampling strategy is "ratelimiting". The default operations level strategies are added as expected for "probablistic" service sampling strategies.

After investigating why that is so - I found the part which I believe is the cause of the problem, and since its much simpler to reproduce the issue via an updated unit test which is covering that specific situation - I went with that in the bug description, instead of the whole repo and the whole story of how the issue was reproduced.

Hope this clarifies things.

from jaeger.