Cannot change Content-Type from Groovy policy failure result

[exalate-issue-sync]

Steps to reproduce

• create an API with keyless plan
• add Groovy policy to the response with the following script as “on response content script”:

import io.gravitee.policy.groovy.PolicyResult.State
if (request.headers.containsKey('X-Gravitee-Break')) {

response.headers.'X-Groovy-Policy' = 'ko';

result.state = State.FAILURE;

result.code = 500;

result.error = 'Stop request processing due to X-Gravitee-Break header';

result.contentType = 'application/xml';

} else {

response.headers.'X-Groovy-Policy' = 'ok';

}

• call the API with X-Gravitee-Break header.

Expected result

the response should have application/xml content type.

Actual result

response has application/json content type

Unable to render embedded object: File (/secure/attachment/11623/11623_Screenshot 2023-05-23 at 16.57.23 %282%29.png) not found.

[!/secure/attachment/11623/11623_Screenshot 2023-05-23 at 16.57.23 %282%29.png!|/secure/attachment/11623/11623_Screenshot+2023-05-23+at+16.57.23+%282%29.png]

Linked to https://gravitee.atlassian.net/browse/APIM-1752

and

https://graviteesource.zendesk.com/agent/tickets/6428