Couldn't find PersistentEntity for type class debug error

Question

I have the following piece of code that tries to insert a document object into mongoDB.

        return reactiveMongoTemplate.insert(document)
                .doOnSuccess(filler -> System.out.println(filler))
                .onErrorResume(e -> {
                    String message = format("Error saving %s", e.getMessage());
                    log.error(message, e);
                    throw new PersistenceException(message, e);
                })
                .block();

When I debug I get an error that says org.springframework.data.mapping.MappingException: Couldn't find PersistentEntity for type class org.bson.Document!

This is identified to be in the first line with the return. Does anyone know why this is happening?

Answer 1

This seems to be a bug (at least it is similar to this reported issue ). Anyway, it seems the insert method that includes the collection name as the second parameter does work correctly:

return reactiveMongoTemplate.insert(document, "documentCollection")
  // ...

That worked for me.