Hi Guillaume,

thanks for the quick answer.
Maybe it's possible to register a type adapter for Long.class inside DefaultGsonService to enforce "non-scientific" notation?
Something like this:

Gson gson = new GsonBuilder()
				.setDateFormat( AbstractJestClient.ELASTIC_SEARCH_DATE_FORMAT )
				.serializeNulls()
				.registerTypeAdapter(Long.class, ....)
				.create();

But I am not exactly sure how to implement this adapter, but it shouldn't be complicated.