AwsHttpServletResponse includes headers with NULL values wich causes 502 ALB responses

[ekruczek]

AwsHttpServletResponse:setHeader method doesn't check if header values are null. This causes 502 ALB responses.

We have come across this issue after the update to SpringBoot 3.5.5 while testing exception handlers.
This bug can affect more versions as it is caused by springweb-mvc bugfix spring-projects/spring-framework@6bd12e8

[erikpragt-connectid]

Hi @ekruczek , we have exactly the same issue:

spring-projects/spring-framework#35459

We also have an AWS case for this: CASE 175756065000332

Would be great if someone could apply your patch. I'll contact AWS.

[reedham-aws]

Closed by #1523, which has been merged and released in version 2.1.5.