SLF4J 在 vertx 上找不到 logback-classic 的提供者

Question

我正在尝试在 Vertx 项目上添加 Logback，但似乎 SLF4J 无法看到 logback，即使它本身来自 logback 依赖项。我使用了 Maven 依赖项 logback-classic，它可以传递导入 slf4j-api 和 logback-core （预期的提供程序）。

当我使用随机日志运行一个简单的主类时，出现以下错误：

SLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation 
SLF4J: See https://www.slf4j.org/codes.html#noProviders for further details.

我的pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.example</groupId>
  <artifactId>vertx-stock-broker</artifactId>
  <version>1.0.0-SNAPSHOT</version>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
    <maven-shade-plugin.version>3.2.4</maven-shade-plugin.version>
    <maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version>
    <exec-maven-plugin.version>3.0.0</exec-maven-plugin.version>

    <vertx.version>4.5.11</vertx.version>
    <logback-classic.version>1.5.12</logback-classic.version>
    <junit-jupiter.version>5.9.1</junit-jupiter.version>

    <main.verticle>com.example.vertx_stock_broker.MainVerticle</main.verticle>
    <launcher.class>io.vertx.core.Launcher</launcher.class>
  </properties>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>io.vertx</groupId>
        <artifactId>vertx-stack-depchain</artifactId>
        <version>${vertx.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <dependencies>
    <dependency>
      <groupId>io.vertx</groupId>
      <artifactId>vertx-web</artifactId>
    </dependency>
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>${logback-classic.version}</version>
    </dependency>

    <dependency>
      <groupId>io.vertx</groupId>
      <artifactId>vertx-junit5</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-api</artifactId>
      <version>${junit-jupiter.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-engine</artifactId>
      <version>${junit-jupiter.version}</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>${maven-compiler-plugin.version}</version>
        <configuration>
          <release>17</release>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-shade-plugin</artifactId>
        <version>${maven-shade-plugin.version}</version>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>shade</goal>
            </goals>
            <configuration>
              <transformers>
                <transformer
                  implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                  <manifestEntries>
                    <Main-Class>${launcher.class}</Main-Class>
                    <Main-Verticle>${main.verticle}</Main-Verticle>
                  </manifestEntries>
                </transformer>
                <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
              </transformers>
              <outputFile>${project.build.directory}/${project.artifactId}-${project.version}-fat.jar
              </outputFile>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>${maven-surefire-plugin.version}</version>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>exec-maven-plugin</artifactId>
        <version>${exec-maven-plugin.version}</version>
        <configuration>
          <mainClass>${launcher.class}</mainClass>
          <arguments>
            <argument>run</argument>
            <argument>${main.verticle}</argument>
          </arguments>
        </configuration>
      </plugin>
    </plugins>
  </build>


</project>

跑步班：

package com.example.vertx_stock_broker;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Test {
  private static final Logger LOG = LoggerFactory.getLogger(Test.class);

  public static void main(String[] args) {
    LOG.debug("debug");
    LOG.info("info");
    LOG.error("error");
  }
}

我使用 Intellij 运行工具运行它，该工具默默地运行（我用“...”缩短了路径）：

openjdk-22.0.2\bin\java.exe "-javaagent:...\IntelliJ IDEA 2024.2.3\lib\idea_rt.jar=64366:...\IntelliJ IDEA 2024.2.3\bin" 
-Dfile.encoding=UTF-8 
-Dsun.stdout.encoding=UTF-8 
-Dsun.stderr.encoding=UTF-8 
-classpath ...\vertx-stock-broker\target\classes;
    ....m2\repository\io\vertx\vertx-web\4.5.11\vertx-web-4.5.11.jar;
    ....m2\repository\io\vertx\vertx-web-common\4.5.11\vertx-web-common-4.5.11.jar;
    ....m2\repository\io\vertx\vertx-auth-common\4.5.11\vertx-auth-common-4.5.11.jar;
    ....m2\repository\io\vertx\vertx-bridge-common\4.5.11\vertx-bridge-common-4.5.11.jar;
    ....m2\repository\io\vertx\vertx-core\4.5.11\vertx-core-4.5.11.jar;
    ....m2\repository\io\netty\netty-common\4.1.115.Final\netty-common-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-buffer\4.1.115.Final\netty-buffer-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-transport\4.1.115.Final\netty-transport-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-handler\4.1.115.Final\netty-handler-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-transport-native-unix-common\4.1.115.Final\netty-transport-native-unix-common-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-codec\4.1.115.Final\netty-codec-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-handler-proxy\4.1.115.Final\netty-handler-proxy-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-codec-socks\4.1.115.Final\netty-codec-socks-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-codec-http\4.1.115.Final\netty-codec-http-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-codec-http2\4.1.115.Final\netty-codec-http2-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-resolver\4.1.115.Final\netty-resolver-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-resolver-dns\4.1.115.Final\netty-resolver-dns-4.1.115.Final.jar;
    ....m2\repository\io\netty\netty-codec-dns\4.1.115.Final\netty-codec-dns-4.1.115.Final.jar;
    ....m2\repository\com\fasterxml\jackson\core\jackson-core\2.16.1\jackson-core-2.16.1.jar;
    ....m2\repository\ch\qos\logback\logback-core\1.5.12\logback-core-1.5.12.jar;
    ....m2\repository\org\slf4j\slf4j-api\2.0.7\slf4j-api-2.0.7.jar com.example.vertx_stock_broker.MainVerticle

我的 logback.xml 文件：

<configuration>
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>

  <root level="debug">
    <appender-ref ref="STDOUT" />
  </root>
</configuration>

我没有发现任何依赖冲突或重复。使用的是OpenJdk22。

我希望在运行时获得logback日志

Answer 1

仅供参考，logback-classic.jar 是 slf4j 提供者不是 logback-core.jar。