Quarkus中log4j2-jboss-logmanager无法输出MDC内容求助

我需要将内容存入org.jboss.logging.MDC并通过Log4j2输出，但Log4j2日志无法显示该MDC值；使用java.util.logging.Logger和org.jboss.logging.Logger时，log.info("test with log4j")能正常显示MDC内容。相关代码及配置如下：

资源类代码 #

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

import lombok.log4j.Log4j2;
import org.apache.logging.log4j.ThreadContext;
import org.jboss.logging.MDC;
import java.io.IOException;

@Path("/hello")
@Log4j2
public class MDCLog4j2Resource {

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String hello() throws IOException {

        MDC.put("MDCTest", "MDCTest");
        System.out.println("MDC value:" + MDC.get("MDCTest"));
        System.out.println("ThreadContext MDCTest value:" + ThreadContext.get("MDCTest"));
        System.out.println("log4j Logger class: " + getClass().getClassLoader()
                                                              .getResources("org/apache/log4j/Logger.class"));
        System.out.println("log4j LogManager class: " + getClass().getClassLoader()
                                                                  .getResources("org/apache/logging/log4j.LogManager"));
        System.out.println("log42 AbstractLogger Logger: " + getClass().getClassLoader()
                                                                       .getResources(
                                                                           "org/apache/logging/log4j/spi.AbstractLogger"));

        log.info("test with log4j");
        System.out.println("ThreadContext value :" + ThreadContext.get("MDCTest"));
        return ThreadContext.get("MDCTest");
    }

}

测试类代码 #

import org.apache.logging.log4j.ThreadContext;
import org.jboss.logging.MDC;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

public class MDCLog4j2ResourceTest {

    @BeforeAll
    public static void setup() {
        System.setProperty("org.jboss.logging.provider", "log4j2");
    }

    @Test
    void testMdc() throws ClassNotFoundException {
        MDC.put("test.key", "value");
        Assertions.assertEquals("value", MDC.get("test.key"));
        Assertions.assertEquals("value", ThreadContext.get("test.key"));
        final ClassLoader cl = MDCLog4j2ResourceTest.class.getClassLoader();

        Class.forName("org.apache.logging.log4j.Logger", true, cl);
        Class.forName("org.apache.logging.log4j.LogManager", true, cl);
        Class.forName("org.apache.logging.log4j.spi.AbstractLogger", true, cl);
    }

}

pom.xml配置 #

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"
  xmlns="http://maven.apache.org/POM/4.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example</groupId>
  <artifactId>quarkuslog4j2mdcissueapp</artifactId>
  <version>1.0-SNAPSHOT</version>
  <properties>
    <compiler-plugin.version>3.10.1</compiler-plugin.version>
    <maven.compiler.release>11</maven.compiler.release>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>
    <quarkus.platform.group-id>io.quarkus.platform</quarkus.platform.group-id>
    <quarkus.platform.version>2.16.4.Final</quarkus.platform.version>
    <skipITs>true</skipITs>
    <surefire-plugin.version>3.0.0-M7</surefire-plugin.version>
    <cp.test.classes.dir>${project.build.directory}${file.separator}cp-test-classes</cp.test.classes.dir>
  </properties>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>${quarkus.platform.group-id}</groupId>
        <artifactId>${quarkus.platform.artifact-id}</artifactId>
        <version>${quarkus.platform.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>io.quarkus</groupId>
      <artifactId>quarkus-resteasy</artifactId>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.24</version>
    </dependency>
    <dependency>
      <groupId>org.jboss.logmanager</groupId>
      <artifactId>log4j2-jboss-logmanager</artifactId>
      <version>1.1.1.Final</version>
    </dependency>
    <dependency>
      <groupId>io.quarkus</groupId>
      <artifactId>quarkus-logging-json</artifactId>
    </dependency>
    <dependency>
      <groupId>io.quarkus</groupId>
      <artifactId>quarkus-junit5</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>io.rest-assured</groupId>
      <artifactId>rest-assured</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>${quarkus.platform.group-id}</groupId>
        <artifactId>quarkus-maven-plugin</artifactId>
        <version>${quarkus.platform.version}</version>
        <extensions>true</extensions>
        <executions>
          <execution>
            <goals>
              <goal>build</goal>
              <goal>generate-code</goal>
              <goal>generate-code-tests</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>${compiler-plugin.version}</version>
        <configuration>
          <compilerArgs>
            <arg>-parameters</arg>
          </compilerArgs>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>${surefire-plugin.version}</version>
        <configuration>
          <systemPropertyVariables>
            <org.jboss.logging.provider>log4j2</org.jboss.logging.provider>
            <quarkus.log.level>DEBUG</quarkus.log.level>
            <maven.home>${maven.home}</maven.home>
          </systemPropertyVariables>
          <classpathDependencyExcludes>
          </classpathDependencyExcludes>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-failsafe-plugin</artifactId>
        <version>${surefire-plugin.version}</version>
        <executions>
          <execution>
            <goals>
              <goal>integration-test</goal>
              <goal>verify</goal>
            </goals>
            <configuration>
              <systemPropertyVariables>
                <native.image.path>${project.build.directory}/${project.build.finalName}-runner
                </native.image.path>
                <org.jboss.logging.provider>log4j2</org.jboss.logging.provider>
                <quarkus.log.level>DEBUG</quarkus.log.level>
                <maven.home>${maven.home}</maven.home>
              </systemPropertyVariables>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
  <profiles>
    <profile>
      <id>native</id>
      <activation>
        <property>
          <name>native</name>
        </property>
      </activation>
      <properties>
        <skipITs>false</skipITs>
        <quarkus.package.type>native</quarkus.package.type>
      </properties>
    </profile>
  </profiles>
</project>

排查情况 #

• 测试类运行正常，能在MDC存入值并从ThreadContext获取，且org.jboss.logging.Log4j.LoggerProvider被选为日志提供者
• 即使通过VM选项设置-Dorg.jboss.logging.provider=log4j2，Log4j2仍未被选为日志提供者，始终使用JBossLogManager
• 跟踪发现org.jboss.logging.LoggerProviders尝试加载Log4j2时，无法在类路径中找到org.apache.logging.log4j.Logger类，抛出异常后转而使用JBossLogManager
• 已在pom.xml中添加log4j2-jboss-logmanager依赖（该依赖会引入log4j-api库），且运行时Log4j2相关类确实存在（测试类中通过类加载器检查可验证）

疑问 #

为何org.jboss.logging.LoggerProviders加载Log4j2时找不到org.apache.logging.log4j.Logger类？

内容的提问来源于stack exchange，提问作者C. Bilgin