Print response details only in case of failures

Gatling (Open-Source)
1

I’m using Gatling 3. Below is what my logback.xml looks like. The problem is that while this serves the purpose, it also prints a lot of other details too on the console which I do not really need.

I tried tweaking the levels to ERROR, TRACE, WARN, etc. but the response details are not printed in any of those cases.

Am I missing something?

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender" immediateFlush="false">
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%-5level] %logger{15} - %msg%n%rEx</pattern>
        </encoder>
    </appender>
    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
        <file>../gatling.log</file>
        <append>true</append>
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%-5level] %logger{15} - %msg%n%rEx</pattern>
        </encoder>
    </appender>
    <!-- Uncomment for logging ALL HTTP request and responses -->
    <!--  <logger name="io.gatling.http.ahc" level="TRACE" /> -->
    <!--   <logger name="io.gatling.http.response" level="TRACE" /> -->
    <!-- Uncomment for logging ONLY FAILED HTTP request and responses -->
    <logger name="io.gatling.http.ahc" level="DEBUG"/>
    <logger name="io.gatling.http.response" level="DEBUG"/>
    <root level="WARN">
        <appender-ref ref="CONSOLE"/>
    </root>
    <root level="DEBUG">
        <appender-ref ref="FILE" />
    </root>
</configuration>