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Apache Log4j 2.x with slf4j bridges

<!-- Merge with your dependencies section -->
<dependencies>
  <!-- logging backend: log4j 2.x -->
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->
  </dependency>
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->
    <scope>runtime</scope>
  </dependency>

  <!-- slf4j implementation that forwards to log4j 2.x -->
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j2-impl</artifactId> <!-- for slf4j 1.7.x use log4j-slf4j-impl instead -->
    <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->
    <scope>runtime</scope>
  </dependency>
</dependencies>

Logback

<!-- Merge with your dependencies section -->
<dependencies>
  <!-- slf4j implementation -->
  <dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>${logback.version}</version>
    <scope>runtime</scope>
  </dependency>

  <!-- log4j2 to slf4j adapter -->
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-to-slf4j</artifactId>
    < <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->
    <scope>runtime</scope>
  </dependency>
</dependencies>

Apache Log4j 2.x with native bridges

<dependencies>

  <dependency>
    <groupId>org.apache.tika</groupId>
    <artifactId>tika-parsers-standard-package</artifactId>
    <exclusions>
      <exclusion>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
      </exclusion>
      <exclusion>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
      </exclusion>

      <exclusion>

        <groupId>org.slf4j</groupId>

        <artifactId>slf4j-log4j12</artifactId>

      </exclusion>
      <exclusion>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-reload4j</artifactId>
      </exclusion>

      <exclusion>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-core</artifactId>
      </exclusion>
      <exclusion>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
      </exclusion>
      <exclusion>
        <groupId>ch.qos.reload4j</groupId>
        <artifactId>reload4j</artifactId>
      </exclusion>


      <!-- Additionally exclude slf4j bridges -->

      <exclusion>

        <groupId>org.slf4j</groupId>

        <artifaftId>jul-to-slf4j</artifactId>

      </exclusion>

      <exclusion>

        <groupId>org.slf4j</groupId>

        <artifaftId>jul-to-slf4j</artifactId>

      </exclusion>

      <exclusion>

        <groupId>org.slf4j</groupId>

        <artifaftId>jcl-over-slf4j</artifactId>

      </exclusion>

      <exclusion>

        <groupId>org.slf4j</groupId>

        <artifaftId>log4j-over-slf4j</artifactId>

      </exclusion>

    </exclusions>
  </dependency>


  <!-- slf4j implementation to forward logs to log4j 2.x -->

  <dependency>

    <groupId>org.apache.logging.log4j</groupId>

    <artifactId>log4j-slf4j2-impl</artifactId> <!-- for slf4j 1.7.x use log4j-slf4j-impl instead -->

    < <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->

    <scope>runtime</scope>

  </dependency>


  <!-- log4j 2.x bridges to forward java.util.logging, jcl/commons-logging and log4j 1.2.x to log4j 2.x -->

  <dependency>

    <groupId>org.apache.logging.log4j</groupId>

    <artifactId>log4j-jul</artifactId>

    <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->

  </dependency>

  <dependency>

    <groupId>org.apache.logging.log4j</groupId>

    <artifactId>log4j-jcl</artifactId>

    < <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->

    <scope>runtime</scope>

  </dependency>
<dependency>

  <dependency>
    <groupId>org.apache.logging.log4j</groupId>

    <artifactId>log4j-1.2-api</artifactId>

    <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->

    <scope>runtime</scope>

  </dependency>


  <!-- logging backend: log4j 2.x -->

  <!-- this dependency declarations are optional since org.apache.logging.log4j:log4j-slf4j-impl depends on them transitively -->
<dependency>

  <dependency>
    <groupId>org.apache.logging.log4j</groupId>

    <artifactId>log4j-api</artifactId>

    < <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->

  </dependency>

  <dependency>

    <groupId>org.apache.logging.log4j</groupId>

    <artifactId>log4j-core</artifactId>

   <  <!-- version is omitted since there's org.apache.logging.log4j:log4j-bom in the dependencyManagement section -->

    <scope>runtime</scope>

  </dependency>

</dependencies>

Example configuration for Apache Tika 2.5.0+ (Gradle)

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