[BUG] duration for APM aws.lambda.load span > cold_start parent span

[pvicente]

Expected Behavior

aws.lambda.load span <= cold_start parent span

Actual Behavior

aws.lambda.load span > cold_start parent span

Steps to Reproduce the Problem

Specifications

• Datadog Lambda Layer version: 4.75.0
• Python version: 3.10

Serverless AWS lambda

datadog-lambda 4.75.0
dd_extension 45
dd_trace 1.7.1

Stacktrace

Child aws.lambda.load <= parent cold_start span

I can see durations of 10 minutes or more in some traces

Paste here

[astuyve]

hey @pvicente - thanks for reaching out!
It seems that yes, there's a slight bug here where the load span is drawn across all modules - even when some modules are imported during the Lambda init process, and some are loaded during the first invocation.

Clearly this is most apparent when Lambda proactively initializes a sandbox (which we're finally allowed to discuss publicly).

We'll look into this and close this issue when we produce a fix.

Thank you!

[astuyve]

Sorry I never closed this! It should be solved by the min call here.