As the most widely used logging framework on the internet, Apache Log4j 2 is integrated into myriad applications, used on major cloud services such as Apple, Google, Microsoft and Cloudflare, as well as platforms like Twitter and Stream. It logs messages from software, and searches for errors afterwards. The amount of recordable data is broad, and ranges from basic user browser and web page information to detailed technical information about the system Log4j 2 is running on.