The original issue is from here: https://github.com/smallrye/smallrye-open-api/issues/785 

Here is a short summary of the two cases, where types from an EAR are not correctly resolved.

Case 1:
my.ear

• jpa.jar
• rest.war

Types contained jpa.jar and used in the rest.war are not shown in the OpenApi defintion of the rest.war.|

Case 2:

my.ear

• lib
  • common.jar
• rest.war

Types contained common.jar and used in the rest.war are not shown in the OpenApi defintion of the rest.war.|

I'll provide a PR soon.