log4j is a reliable, fast and flexible logging framework (APIs) written in Java, which is distributed under the Apache Software License.
log4j is a popular logging package written in Java. log4j has been ported to the C, C++, C#, Perl, Python, Ruby, and Eiffel languages.
The Log4j flaw, disclosed by Apache last week, allows attackers to execute code remotely on a target computer, meaning that they can steal data, install malware or take control