AWS Lambda function Timedout after 3 sec using AWS SAM

Question

I am new to AWS and Go and I am trying to execute my Lambda function via AWS SAM CLI. But every time I try to do so I get the following error:

I0517 07:51:11.052078      13 main.go:62] Thumbnail Lambda successfully started 
I0517 07:51:13.696304      13 utils.go:99] Needed directories successfully created
2019-05-17 09:51:14 Function 'Thumbnail' timed out after 3 seconds
2019-05-17 09:51:14 Function returned an invalid response (must include one of: body, headers or statusCode in the response object). Response received:

I did not want to copy information I pass in the HTTP request since its sensitive.

Any idea how I can modify this 3 second timeout?

How did you set up your lambda? Via console? SDK? Cloudformation? For all of the above, you can set the value of the timeout. The default is 3 seconds, hence the above error. Edit: ah, you are using the SAM cli? You probably have a template.yaml file in your project. Search for 'Timeout' and check the value — Hieron, May 17 '19 at 08:20

score 51 · Answer 1 · answered May 17 '19 at 21:10

The default timeout of Lambda functions is 3 seconds. You can set any value by updating the Timeout property in your SAM template, e.g.

ExampleLambda:
  Type: AWS::Serverless::Function
  Properties:
    CodeUri: .
    Handler: index.handler
    Runtime: nodejs10.x
    Timeout: 10

score 19 · Accepted Answer · answered May 17 '19 at 08:38

19

I am using template.yml in order to set up my lambda. I forgot to re-build and re-run sam local start-api when I introduced Timeout property to it. Honest mistake, thank you for your time.

answered May 17 '19 at 08:38

Stefan Radonjic

1,449
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score 3 · Answer 3 · answered May 20 '20 at 13:31

This doesn't pertain to sam local start-api, but if you're developing in PyCharm and running a single Lambda function with the PyCharm run button, there's another setting you might not have seen in the run configuration window where you can specify the timeout:

AWS Lambda function Timedout after 3 sec using AWS SAM

3 Answers3

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