[I] Log4j2 yml config do not support YAML Anchors and Aliases (logging-log4j2)

[via GitHub]

darkSheep404 opened a new issue, #3358:
URL: https://github.com/apache/logging-log4j2/issues/3358

   ## Description
   
   Log4j2 yml config do not support YAML Anchors and Aliases with error Logger 
contains an invalid element or attribute "<<"
   ```
   Configuration:
     status: WARN
     Appenders:
       RollingFileTemplate: &RollingFileTemplate
         ignoreExceptions: false
         PatternLayout:
           pattern: "[%d{yyyy-MM-dd HH:mm:ss.SSS}] [%X{traceId},%X{spanId}] 
[%pid] [%thread] %-5level %X{class}.%M - %msg%n"
         Policies:
           SizeBasedTriggeringPolicy:
             size: "50 MB"
         DefaultRolloverStrategy:
           max: 200
       RollingFile:
         - name: XX_LOGGER_LOG
           fileName: ./logs/xx/${env:HOSTNAME:-}/app/app.log
           filePattern: "./logs/xx/${env:HOSTNAME:-}/app/app_%d{yyyy}-%i.log.gz"
           <<: *RollingFileTemplate
     Loggers:
       Root:
         level: INFO
         AppenderRef:
           - ref: CONSOLE_OUT_APPENDER
           - ref: XX_LOGGER_LOG
   
   ```
   
   
   ```
   main ERROR Unable to locate plugin for LoggerTemplate
   2025-01-06T08:35:01.514260458Z 2025-01-06 08:35:01,514 main ERROR Logger 
contains an invalid element or attribute "<<"
   2025-01-06T08:35:01.514794013Z 2025-01-06 08:35:01,514 main ERROR Logger 
contains an invalid element or attribute "<<"
   2025-01-06T08:35:01.515709563Z 2025-01-06 08:35:01,515 main ERROR Logger 
contains an invalid element or attribute "<<"
   2025-01-06T08:35:01.516202917Z 2025-01-06 08:35:01,516 main ERROR Logger 
contains an invalid element or attribute "<<"
   2025-01-06 08:35:01,516 main ERROR Unable to invoke factory method in class 
org.apache.logging.log4j.core.config.LoggersPlugin for element Loggers: 
java.lang.NullPointerException 
   ```
   ## Configuration
   
   **Version:** [2.18.0]
   
   **Operating system:** [redheat]
   
   **JDK:** [JDK 8 ]
   
   ## Logs
   
   ```
   [Stacktraces, errors, etc. relevant applications logs.]
   ```
   
   ## Reproduction
   
   ```
   
   ```
   [An isolated test reproducing the test.
   JUnit tests similar to the ones in the code base are extremely appreciated.]
   


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