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Migrating off of Log4j 2.x

Thomas Broyer on December 20, 2021

There's been three versions of Log4j in one week to address security flaws, all of them due to the same lookups feature. This feature is somewhat u...
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Phil Harron •

Hello, thanks for the helpful information.

One thing that caught me out in the logback.xml with rolling file appender example was the appenders are not defined in the correct order, which ultimately caused no logs to be written to my log file.

It should be:

  <appender name="LogFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>/var/log/myapp/myapp.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <fileNamePattern>/var/log/myapp/myapp-%d{yyy-MM-dd}.log.gz</fileNamePattern>
      <maxHistory>7</maxHistory>
    </rollingPolicy>
    <encoder>
      <pattern>%d %p %c{1} [%t] %m%n</pattern>
    </encoder>
  </appender>
  <appender name="AsyncLogFile" class="ch.qos.logback.classic.AsyncAppender">
    <appender-ref ref="LogFile" />
  </appender>
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Many thanks
Phil

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Thomas Broyer •

Thanks! Should be fixed now.