spark/src/test/resources/log4j2.xml

<?xml version="1.0" encoding="UTF-8" ?>
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<Configuration status="WARN">
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{ISO8601} %p [%t] %c - %m%n"/>
        </Console>
    </Appenders>
    <Loggers>
        <Root level="info">
            <AppenderRef ref="Console"/>
        </Root>
        <Logger level="warn" name="org.apache.spark" additivity="false">
            <AppenderRef ref="Console"/>
        </Logger>
        <!-- Suppress allocation warning during local tests -->
        <Logger level="error" name="org.apache.druid.java.util.common.io.NativeIO" additivity="false">
            <AppenderRef ref="Console"/>
        </Logger>
        <!-- Suppressing Reference Counter warnings during local tests -->
        <Logger level="error" name="org.apache.druid.collections.StupidPool" additivity="false">
            <AppenderRef ref="Console"/>
        </Logger>
        <!-- Suppressing default registration methods during local tests -->
        <Logger level="warn" name="org.apache.druid.spark.registries.ComplexTypeRegistry" additivity="false">
            <AppenderRef ref="Console"/>
        </Logger>
    </Loggers>
</Configuration>