Werk #17773: aws_lambda_performance: Handle missing invocation metrics gracefully

Component

Checks & agents

Title

aws_lambda_performance: Handle missing invocation metrics gracefully

Date

May 23, 2025

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.5.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0p3	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p34	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

The aws_lambda_performance check now handles cases where the values for the "Invocations" metric are missing. Previously, missing invocation data would cause parsing errors, such as:

TypeError (LambdaCloudwatchMetrics.__init__() missing 1 required positional argument: 'Invocations')

With this change, the check treats missing values as zero, ensuring that the check output remains consistent and does not fail when AWS does not report invocation metrics for unused Lambda functions.

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