I'm trying to change the label in the log. I only want to get {"level":"WARNING","msg":"test"} instead of {"level":"WARN","msg":"test"}.

My class is:

package com.abc.def;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

@SpringBootApplication
public class Application extends SpringBootServletInitializer {

    private static final Logger LOG = LoggerFactory.getLogger(Application.class);

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(Application.class);

    }

    public static void main(String[] args) {
        LOG.warn("test");
        SpringApplication.run(Application.class, args);
    }

}

My logback.xml file is:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
   <property resource="application.properties" />
   <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
      <encoder class="net.logstash.logback.encoder.LoggingEventCompositeJsonEncoder">
         <providers>
            <logLevel>
               <fieldName>level</fieldName>
            </logLevel>
            <arguments>
               <includeNonStructuredArguments>false</includeNonStructuredArguments>
            </arguments>
            <stackTrace>
               <fieldName>stack</fieldName>
            </stackTrace>
            <message>
               <fieldName>msg</fieldName>
            </message>
         </providers>
      </encoder>
   </appender>
   <root level="INFO">
      <appender-ref ref="CONSOLE" />
   </root>
</configuration>

I tried many changes but finally I don't any solution except creating a new class that extends net.logstash.logback.encoder.LoggingEventCompositeJsonEncoder.

That seems a big stuff for a very small change.

I posted already in stackoverflow https://stackoverflow.com/questions/72476767/how-to-change-the-log-level-label-with-slf4j

Thanks for helps