Don't truncate gen ai custom dimensions#48385
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Pull request overview
This PR updates the telemetry-building logic in azure-monitor-opentelemetry-autoconfigure to avoid truncating certain gen_ai.* custom dimension values, which can legitimately be much larger than the standard property value limit.
Changes:
- Add a truncation exemption list for specific
gen_ai.*property keys inAbstractTelemetryBuilder.addProperty(). - Add unit tests validating standard truncation behavior and the new
gen_ai.*non-truncation behavior.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
.../builders/AbstractTelemetryBuilder.java |
Skips 8192-char truncation for a fixed set of gen_ai.* property keys. |
.../builders/AbstractTelemetryBuilderTest.java |
Adds coverage for regular truncation vs. truncation-exempt gen_ai.* property keys. |
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...onitor/opentelemetry/autoconfigure/implementation/builders/AbstractTelemetryBuilderTest.java
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rajkumar-rangaraj
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Mar 11, 2026
…/java/com/azure/monitor/opentelemetry/autoconfigure/implementation/builders/AbstractTelemetryBuilderTest.java Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
rajkumar-rangaraj
approved these changes
Mar 12, 2026
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This PR iterates through custom dimensions to ensure that gen ai properties don't get truncated.