Spring boot+slf4j+log4j+类org.apache.logging.slf4j.slf4jLoggerContext不能强制转换为类

Question

null

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>logger</groupId>
    <artifactId>logger</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>logger</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>11</java.version>
        <lombok.version>1.18.12</lombok.version>
        <log4j.version>1.2.17</log4j.version>
        <slf4j.version>1.7.30</slf4j.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>logback-classic</artifactId>
                    <groupId>ch.qos.logback</groupId>
                </exclusion>
            </exclusions>
        </dependency>


        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

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@Slf4j
@SpringBootApplication
public class LoggerApplication {

    public static void main(String[] args) {

        log.info("++++++++++++++++++++++++TEST+++++++++++++++++++++++++++++");

        SpringApplication.run(LoggerApplication.class, args);
    }

}

• application.properties

logging.config=classpath:log4j.properties

• log4j.properties

log4j.rootLogger=INFO, console
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.Target=System.out
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p - %m%n

我试图找到一个解决方案，看了论坛上类似的话题，尝试了各种排除依赖关系的选择。

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>logback-classic</artifactId>
                    <groupId>ch.qos.logback</groupId>
                </exclusion>

                    <exclusion>
                        <groupId>log4j</groupId>
                        <artifactId>*</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>org.slf4j</groupId>
                        <artifactId>*</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>org.apache.logging.log4j</groupId>
                        <artifactId>*</artifactId>
                    </exclusion>

            </exclusions>
        </dependency>

错误StatusLogger无法识别格式说明符[n]错误StatusLogger无法识别转换说明符[n]从转换模式中的位置56开始。警告：不支持Sun.Reflect.Reflection.GetCallerClass。这将影响性能。

谁能有什么想法如何修复它？

Answer 1

我找到了解决这个问题的方法。事实证明，问题出在其中一个私有库（elastik的附加程序）的冲突上。

我执行了命令：

mvn dependency:tree

然后找到传递依赖项，并在所有类的路径上排除它们，以排除日志记录所需的库confilcts。

null

<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
      <exclusions>
        <exclusion>
          <artifactId>logback-classic</artifactId>
          <groupId>ch.qos.logback</groupId>
        </exclusion>
        <exclusion>
          <artifactId>log4j-to-slf4j</artifactId>
          <groupId>org.apache.logging.log4j</groupId>
        </exclusion>
      </exclusions>
    </dependency>

    <dependency>
      <artifactId>springfox-boot-starter</artifactId>
      <groupId>io.springfox</groupId>
      <version>3.0.0</version>
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

 <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>${lombok.version}</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>

      <dependency>
          <groupId>org.apache.logging.log4j</groupId>
          <artifactId>log4j-core</artifactId>
          <version>${version.log4j.core}</version>
      </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${slf4j.version}</version>
    </dependency>