after trying to send an http request using apache olingo(version 4.4.0), i encountered some problems regarding null values. After doing some research i found out that the problem was fixed : https://github.com/apache/olingo-odata4/pull/21/commits/6d5ed5a6c39890f7813763869eda292d712f5e77 , but i haven't found any release with the committed change. I am using maven as my project management tool. I would a appreciate a quick reply.