Troubleshooting AWS Applications with Lumigo > Module 1: Serverless observability > Part 3: Troubleshooting > 3.1 Troubleshoot timeouts (synchronous functions)
3.1 Troubleshoot timeouts (synchronous functions)
Troubleshoot timeouts (synchronous functions)
Let’s see how we can use Lumigo to troubleshoot timeouts for synchronous Lambda functions such as those handling API requests.
- If you click on the timed out issue for the
requestUnicornfunction, it will take you to the function details page for the function and show you the invocations that timed out.
- Click on one of the timed out transactions to see what happened in that transaction.
- From the function logs, you can see a message like
2020-10-20T11:40:37.402Z 3ea3b770-2986-4926-a0b3-2c6a045bfa20 INFO Finding unicorn for 42.34963749150315 , -71.05718295574066
and then 6 seconds later, the invocation timed out.
- Click on the
Timelinetab and you will see that the request to4fsay0n12a.execute-api.us-east-1.amazonaws.comnever completed, hence theN/A. So this was the cause for the invocation timing out.
