Unable to marshal type "bookmarks.BookmarkResource"

[darrylb-github]

When running the HATEOAS project as is and browsing to http://localhost:8080/jhoeller/bookmarks I get the following error:

There was an unexpected error (type=Internal Server Error, status=500).
Could not marshal [Resources { content: [links: [<http://bookmark.com/1/jhoeller>;rel="bookmark-uri", <http://localhost:8080/jhoeller/bookmarks>;rel="bookmarks", <http://localhost:8080/jhoeller/bookmarks/1>;rel="self"], links: [<http://bookmark.com/2/jhoeller>;rel="bookmark-uri", <http://localhost:8080/jhoeller/bookmarks>;rel="bookmarks", <http://localhost:8080/jhoeller/bookmarks/2>;rel="self"]], links: [] }]: null; 
nested exception is javax.xml.bind.MarshalException - with linked exception: [com.sun.istack.internal.SAXException2: 
unable to marshal type "bookmarks.BookmarkResource" as an element because it is missing an @XmlRootElement annotation]

Is there something missing here or is it just me?

[darrylb-github]

This seems to be related to Resources<BookmarkResource> readBookmarks. Changing this to Collection<BookmarkResource> readBookmarks and returning the list without the resources wrapper seems to fix it for me. I'll close this as its probably something to do with my setup.

[ievgen-kapinos]

Helped for me too. TNX. A lot of typo I've found in this tutorial. So seems it is correct fix.

[ziftytodd]

For anyone else hitting this error, if you still want to return a true HATEOAS resource (versus a straight-up Collection), change the @RequestMapping on the readBookmarks method to include a produces attribute:

@RequestMapping(method = RequestMethod.GET, produces = {MediaType.APPLICATION_JSON_VALUE, "application/hal+json"})

Don't forget to import import org.springframework.http.MediaType;

[jflewis]

Is this happening for everyone because I've run into the same issue. Should the above fix by @ziftytodd be implemented? Sorry to bring up a 2 year old issue

[LeonardGC]

@jflewis I did the tutorial just now and was glad to find this page to solve this issue. The fix of @ziftytodd should be implemented asap.
There are other issues with this tutorial as well, like the pointing to the wrong source code (at the start of the tutorial), the addition of the org.springframework.security.oauth dependency from the beginning, (so the examples don't work but are asking for a username and password), etc...
Very confusing.

[cal0610]

It would also be interesting to see how to test methods readSingleBookmark and readBookmarks after using hateoas links...