Log4j vs Logback: What are the differences?
Log4j: A Java-based logging utility. It is an open source logging framework. With this tool – logging behavior can be controlled by editing a configuration file only without touching the application binary and can be used to store the Selenium Automation flow logs; Logback: A logging framework for Java applications. It is intended as a successor to the popular log4j project. It is divided into three modules, logback-core, logback-classic and logback-access. The logback-core module lays the groundwork for the other two modules, logback-classic natively implements the SLF4J API so that you can readily switch back and forth between logback and other logging frameworks and logback-access module integrates with Servlet containers, such as Tomcat and Jetty, to provide HTTP-access log functionality.
Log4j can be classified as a tool in the "Logging Tools" category, while Logback is grouped under "Log Management".
Log4j is an open source tool with 771 GitHub stars and 478 GitHub forks. Here's a link to Log4j's open source repository on GitHub.