This repository was archived by the owner on Mar 23, 2026. It is now read-only.
This repository was archived by the owner on Mar 23, 2026. It is now read-only.
apigateway_listener - TypeError: 'NoneType' object is not iterable #2055
Description
Serverless lambda connected to API Gateway is giving 502 Bad Gateway.
Steps to reproduce:
- Clone: https://github.com/llatinov/aws.examples.csharp
- Install dotnet SDK 2.1 and 3.1
- Install: dotnet tool install -g Amazon.Lambda.Tools
- Run ./local-deploy-serverless.sh
- Send request to API gateway (replace PROPER_GUID with proper serverless URL)
curl --location --request POST 'http://localhost:4567/restapis/PROPER_GUID/local/_user_request_/actors/search' \
--header 'Content-Type: application/json' \
--header 'x-api-key: TEqfCnmXePaltIHHSdnQm6L578MSO6cd1buhgVkt' \
--header 'Authorization: Bearer validToken' \
--data-raw '{
"FirstName": "Bruce",
"LastName": "Willis"
}'
Actual behaviour:
Error is thrown:
localstack_main | 2020-02-16T13:50:11:ERROR:localstack.services.generic_proxy: Error forwarding request: 'NoneType' object is not iterable Traceback (most recent call last):
localstack_main | File "/opt/code/localstack/localstack/services/generic_proxy.py", line 248, in forward
localstack_main | path=path, data=data, headers=forward_headers)
localstack_main | File "/opt/code/localstack/localstack/services/apigateway/apigateway_listener.py", line 49, in forward_request
localstack_main | return invoke_rest_api(api_id, stage, method, relative_path_w_query_params, data, headers, path=path)
localstack_main | File "/opt/code/localstack/localstack/services/apigateway/apigateway_listener.py", line 256, in invoke_rest_api
localstack_main | response.headers.update(parsed_result.get('headers', {}))
localstack_main | File "/opt/code/localstack/.venv/lib/python3.7/_collections_abc.py", line 846, in update
localstack_main | for key, value in other:
localstack_main | TypeError: 'NoneType' object is not iterable
localstack_main |