processing/src/test/resources/log4j2.xml

<?xml version="1.0" encoding="UTF-8" ?>
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  ~ or more contributor license agreements.  See the NOTICE file
  ~ distributed with this work for additional information
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  ~ to you under the Apache License, Version 2.0 (the
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<Configuration status="WARN">
  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout pattern="%d{ISO8601} %p [%t] %c - %m%n"/>
    </Console>

    <Routing name="RoutingAppender">
      <Routes pattern="$${ctx:task.log.id}">
        <!-- Task logs on CliIndexer should go to dedicated file -->
        <Route>
          <File name="task-${ctx:task.log.id}" fileName="${ctx:task.log.file}">
            <PatternLayout pattern="%d{ISO8601} %p [%t] %c -%notEmpty{ [%markerSimpleName]} %m%n"/>
          </File>
        </Route>

        <!-- Default route to send non-task logs to the Console -->
        <Route key="$${ctx:task.log.id}" ref="Console"/>
      </Routes>
    </Routing>

  </Appenders>
  <Loggers>
    <Root level="info">
      <AppenderRef ref="RoutingAppender"/>
    </Root>
    <Logger level="info" name="org.apache.druid" additivity="false">
      <AppenderRef ref="RoutingAppender"/>
    </Logger>
    <Logger level="debug" name="org.apache.calcite.plan.AbstractRelOptPlanner.rule_execution_summary" additivity="false">
      <AppenderRef ref="RoutingAppender"/>
    </Logger>
  </Loggers>
</Configuration>