Count connector improperly handles non-string attributes #30314
Comments
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Thanks for reporting. I agree we need to handle other types as well. Any interest in submitting a fix for this? |
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@djaglowski I would be happy to provide a fix and it seems mostly straightforward, however this one part that isn't immediately obvious. Is there a preferred way to handle the type of the default value: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/connector/countconnector/config.go#L51? |
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That's a good point. Maybe we should define a type constraint which includes a fixed set of types which we would accept. It's not clear exactly which types we should support, but perhaps we could start with a somewhat limited list and go from there. |
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I just ran into this bug today as well, with exactly the same scenario (http status code). For the type constraints, should we start with:
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**Description:** Adding support for non string attributes in the count connector. I started working based on #30314 (comment), but it doesn't work. When I try to add the type constaint: ``` type Number interface { int64 | float64 } type AttributeConfig struct { Key string `mapstructure:"key"` DefaultValue Number `mapstructure:"default_value"` } ``` This causes the following error: ``` cannot use type Number outside a type constraint: interface contains type constraints ``` My idea was to introduce new fields `DefaultIntValue` and `DefaultFloatValue` to handle number types, let me know if this makes sense, if so, I will add documentation and finalize this PR. **Link to tracking Issue:** Fixes #30314. **Testing:** Added unit test **Documentation:** TODO
Component(s)
connector/count
What happened?
Description
When specifying attributes the connector will lose the client provided value if it is not a string, such as for
http.status_code. The connector calls.Str()without checking the type, which results in setting the value to an empty string if the original value is not a string.Steps to Reproduce
Count an attribute sent by clients as a non-string value:
Expected Result
The connector emits metrics with the counts split by
http.status_codeActual Result
The connector emits metrics with
http.status_codeset to an empty string.Collector version
v0.91.0
Environment information
No response
OpenTelemetry Collector configuration
No response
Log output
No response
Additional context
No response
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