java - More info on Cloud Endpoints return types

Question

According to the documentation,

the return value type cannot be simple type such as String or int. The return value needs to be a POJO, an array or a Collection.

This is exactly how things work on the local dev server. However, once deployed, collections and arrays of primitive types result in a 500 Internal Server Error whether the GET URL is typed into the browser or the APIs explorer is used, despite the fact that server logs show 200 Success. Collections of POJOs work fine.

This has been the case for months and through several attempts with different methods. Is this the intended behaviour or is it a bug?

Answer 1

Waitting for answers