Emit FaaS exceptions as logs under the opt-in preview#18892
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Pull request overview
Updates AWS Lambda (FaaS) instrumentation to customize exception log emission under the otel.semconv.exception.signal.preview=logs opt-in, aligning Lambda exception logs with a FaaS-specific event name/severity.
Changes:
- Add a small incubator helper (
FaasExceptionEventExtractors) that configures the exception log event name/severity for FaaS invocations. - Wire the helper into AWS Lambda core and events-common instrumenter builders so the exception signal is configured consistently.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| instrumentation/aws-lambda/aws-lambda-events-common-2.2/library/src/main/java/io/opentelemetry/instrumentation/awslambdaevents/common/v2_2/internal/AwsLambdaEventsInstrumenterFactory.java | Applies the FaaS exception log event extractor to the events-common Lambda instrumenter builder. |
| instrumentation/aws-lambda/aws-lambda-core-1.0/library/src/main/java/io/opentelemetry/instrumentation/awslambdacore/v1_0/internal/AwsLambdaFunctionInstrumenterFactory.java | Applies the FaaS exception log event extractor to the core Lambda instrumenter builder. |
| instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/semconv/faas/FaasExceptionEventExtractors.java | Introduces a reusable helper to set the exception log event name (faas.invocation.exception) and severity (ERROR). |
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laurit
approved these changes
Jun 9, 2026
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Under
otel.semconv.exception.signal.preview=logs(introduced in #16259), FaaS instrumentations now emit their exceptions as log records instead of span events.Part of follow-up work after #16259.