1. Assessment

  • Identify target Lambda and invocation path
  • Collect five days of Lambda error metrics
  • Inspect CloudWatch logs at error timestamps
  • Correlate concurrent Lambda health and performance metrics

2. Summary and Reporting

  • Produce root cause summary report and actions
1 Credits

Investigate Lambda Invocation Errors

Overview

Investigate AWS Lambda invocation errors by identifying the affected function and invocation path, reviewing recent CloudWatch metrics and logs, correlating operational signals, and summarizing the likely root cause. This plan is designed for cases where Lambda health findings or error reports identify functions that need deeper analysis.

Execution Details

1. Assessment

  • Identify target Lambda and invocation path
    Determines the affected Lambda function, alias or version, invocation model, upstream event source, trigger context, and associated CloudWatch log group.

  • Collect five days of Lambda error metrics
    Reviews invocation, error, throttle, duration, concurrency, iterator age, and async delivery metrics for the last five days to establish the timing and scope of failures.

  • Inspect CloudWatch logs at error timestamps
    Focuses log review on failed invocation windows to capture request IDs, exception signatures, stack traces, timeout messages, dependency failures, and nearby successful invocation evidence.

  • Correlate concurrent Lambda health and performance metrics
    Compares error windows against duration, throttling, concurrency, async delivery, and event source backlog signals to identify operational contributors.

2. Summary and Reporting

  • Produce root cause summary report and actions
    Summarizes the investigation timeline, supporting metrics and logs, likely root cause, affected AWS components, confidence level, and AWS-focused follow-up actions.