apache nifi minimal config

logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="30 seconds">
    <contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">
        <resetJUL>true</resetJUL>
    </contextListener>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%date %level [%thread] %logger{40} %msg%n</pattern>
        </encoder>
      <target>System.out</target>
    </appender>
  
      <appender name="STDERR" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%date %level [%thread] %logger{40} %msg%n</pattern>
        </encoder>
        <target>System.err</target>
    </appender>

    <!-- valid logging levels: TRACE, DEBUG, INFO, WARN, ERROR -->

    <root level="ERROR">
        <appender-ref ref="STDERR"/>
    </root>

</configuration>