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AwsHttpServletResponse includes headers with NULL values wich causes 502 ALB responses #1522
Description
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
Activity
erikpragt-connectid commentedon Sep 15, 2025
Hi @ekruczek , we have exactly the same issue:
spring-projects/spring-framework#35459
We also have an AWS case for this:
CASE 175756065000332Would be great if someone could apply your patch. I'll contact AWS.
reedham-aws commentedon Sep 18, 2025
Closed by #1523, which has been merged and released in version 2.1.5.