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Debugging Lambda timeouts
The document discusses strategies for debugging AWS Lambda timeouts, emphasizing the importance of identifying error logs and signposts to uncover root causes. It highlights the challenges associated with timeouts, including mixed error messages and the limitations of existing tools like CloudWatch and X-Ray. The author provides steps for mitigating timeouts and suggests using fallback strategies along with automated tracing for effective resolution.
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Debugging Lambda timeouts
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- 2. Yan Cui theburningmonk.com @theburningmonk Developer Advocate@ Independent Consultant AWS user since 2009 since 2018 yan@lumigo.io
- 6. “look for errorlogs”
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- 12. “could the functionhave timed out?”
- 14. what caused the functionto time out?
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- 17. timeouts are difficultto debug… mixed in with other errors no “error” log message relies on missing signposts to find root cause
- 18. How to detectLambda timeouts How to mitigate/prevent timeouts How to find root cause of timeouts
- 19. How to detectLambda timeouts
- 22. Easy to implement. Languageagnostic. Reliable.
- 23. Easy to implement. Languageagnostic. Reliable. Hard to scale as project grows. Can’t configure metric dimentions. Can’t use AWS/Lambda metric namespace.
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- 28. Time START TIMED OUT logtimeout error
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- 31. Error log messagefor timeouts.
- 32. Error log messagefor timeouts. Requires language specific implementation. Can report false positives.
- 36. It just worksout-of-the-box. No manual instrumentation required. Yet another 3rd party solution.
- 37. How to debugLambda timeouts
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- 40. Easy to implement. Hardto scale as project grows. Only works for your code.
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- 45. Automated tracing. Easy tofind cause of timeout if after you fnid the transaction.
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- 47. Automated tracing. Easy tofind cause of timeout after you fnid the transaction. Still requires some manual instrumentation. Still difficult to find timeouts.
- 51. It just worksout-of-the-box. No manual instrumentation required. More than just tracing. Yet another 3rd party solution.
- 52. How to mitigate/preventtimeouts
- 53. Step 1. timeoutthe operation before it times you out Step 2. execute fallback strategy
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- 59. API Gateway Lambda GET/ Lambda POST /restaurants/search API Gateway Lambda GET / get-index get-restaurants search-restaurants DynamoDB EventBridge Lambda notify-restaurant Lambda place-order POST /order SNS
- 60. API Gateway Lambda GET/ Lambda POST /restaurants/search API Gateway Lambda GET / get-index get-restaurants search-restaurants DynamoDB EventBridge Lambda notify-restaurant Lambda place-order POST /order SNS times out 1/4 times times out most of the time…
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- 62. get 25% offfor 1st year
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