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docs: Correct which attribute RuleBasedSampler checks #2709

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laurit merged 1 commit into from
Mar 17, 2026
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docs: Correct which attribute RuleBasedSampler checks #2709

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2 changes: 1 addition & 1 deletion docs/advanced-config.md
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Expand Up @@ -83,7 +83,7 @@ All requests to downstream services that happen as a consequence of calling an e
The value of `OTEL_TRACES_SAMPLER_ARG` is interpreted as a semicolon-separated list of rules.
The following types of rules are supported:

- `drop=<value>`: The sampler drops a span if its `http.target` attribute has a substring equal to the provided value.
- `drop=<value>`: The sampler drops a span if its `url.path` attribute has a substring equal to the provided value.
You can provide as many `drop` rules as you want.
- `fallback=sampler`: Fallback sampler used if no `drop` rule matched a given span.
Supported fallback samplers are `always_on` and `parentbased_always_on`.
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