log4j/log4j-api/src/main/java/org/apache/logging/log4j/util/ReflectionUtil.java at master · dotCMS/log4j · GitHub
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Java code of log4j with security lock, warning sign and digital numbers. Cyberspace and vulnerability. 3D rendering Stock Photo - Alamy
![ClassNotFoundException: org.apache.logging.log4j.util.StackLocator$FqcnCallerLocator on spring boot 2.3.4 and log4j 2.13.3 - Stack Overflow ClassNotFoundException: org.apache.logging.log4j.util.StackLocator$FqcnCallerLocator on spring boot 2.3.4 and log4j 2.13.3 - Stack Overflow](https://i.stack.imgur.com/n0F2p.png)
ClassNotFoundException: org.apache.logging.log4j.util.StackLocator$FqcnCallerLocator on spring boot 2.3.4 and log4j 2.13.3 - Stack Overflow
![Structured logging in Spring Boot with Log4j2, Part 1: Context-enriched logs | by Zach Corbett McElrath | Medium Structured logging in Spring Boot with Log4j2, Part 1: Context-enriched logs | by Zach Corbett McElrath | Medium](https://miro.medium.com/v2/resize:fit:1400/1*tKVWO2hevnBNf_dgxB98rQ.png)