Using a logback configuration for the Talend Data Preparation log files
       If you want to enable a more advanced logging configuration, you will need to specify a
   logback.xml file in the application.properties
   file.
   
      This logback.xml file containing your configuration is specified using the logging.config=<path-to-config-file> property.
Example of a logback configuration to set the logging to the DEBUG level:
<configuration>
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <!-- encoders are assigned the type
         ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
    <encoder>
      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>
  <root level="debug">
    <appender-ref ref="STDOUT" />
  </root>
</configuration>For more information, see the documentation on the Logback file configuration and the Spring logging system.