Logs rotation based on size in Liferay DXP 7.4

Issue

• Configuring log rotation for logs based on the size.

Environment

• Liferay DXP 7.4

Resolution

• The logs can be rotated based on size by making a small adjustment in the portal-log4j.xml file.
• Extract portal-impl.jar from /tomcat-9.0.73/webapps/ROOT/WEB-INF/shielded-container-lib/ and copy the portal-log4j.xml file. Then, paste portal-log4j.xml into ${TOMCAT_HOME}/webapps/ROOT/WEB-INF/classes/META-INF and rename it to portal-log4j-ext.xml.
• Modify both <Appender> blocks for .log and .xml in portal-log4j-ext.xml to enable log rotation based on size. Following is the sample configuration for reference:
  

  <Appender name="TEXT_FILE" type="RollingFile"
  fileName="@liferay.home@/logs/liferay.log"
  filePattern="@liferay.home@/logs/liferay.%d{yyyy-MM-dd}-%i.log.gz"
  ignoreExceptions="false">
  <Layout type="PatternLayout" pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p [%t][%c{1}:%L] %m%n" />
  <Policies>
  <SizeBasedTriggeringPolicy size="10KB"/>
  </Policies>
  <DefaultRolloverStrategy max="30"/>
  </Appender>
  
  <Appender name="XML_FILE" type="RollingFile"
  fileName="@liferay.home@/logs/liferay.xml"
  filePattern="@liferay.home@/logs/liferay.%d{yyyy-MM-dd}-%i.xml.gz"
  ignoreExceptions="false">
  <Log4j1XmlLayout locationInfo="true" />
  <Policies>
  <SizeBasedTriggeringPolicy size="10KB"/>
  </Policies>
  <DefaultRolloverStrategy max="30"/>
  </Appender>

• Note: The file is rolled over after reaching a specified size of 10KB, creating a maximum of 30 log files. Initially, the log file is named liferay.log. Once it reaches 10KB, it is renamed to liferay.2024-08-22-1.log.gz.

Additional Information

• Log Rotation
• How to override Liferay logs configuration
• Logs rotation based on size