【alluxio编译报错】Some files do not have the expected license header

Some files do not have the expected license header

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正题：如何解决 `Some files do not have the expected license header` 错误问题 🤔

1️⃣ 错误分析

下述完整报错日志：

[INFO] Reactor Summary:
[INFO]
[INFO] Alluxio Integration 2.9.3 .......................... FAILURE
[INFO] Alluxio Integration - JNIFUSE 2.9.3 ................ SKIPPED
[INFO] Alluxio Integration - JNIFUSE - Native 2.9.3 ....... SKIPPED
[INFO] Alluxio Integration - JNIFUSE - Filesystem 2.9.3 ... SKIPPED
[INFO] Alluxio Under File System - S3 2.9.3 ............... SKIPPED
[INFO] Alluxio Integration - FUSE 2.9.3 ................... SKIPPED
[INFO] Alluxio Shaded Libraries 2.9.3 ..................... SKIPPED
[INFO] Alluxio Shaded Libraries - Hadoop 3.3.1 ............ SKIPPED
[INFO] Alluxio Under File System - HDFS 2.9.3 ............. SKIPPED
[INFO] Alluxio Core - Server - Worker 2.9.3 ............... SKIPPED
[INFO] Alluxio Stress 2.9.3 ............................... SKIPPED
[INFO] Alluxio Stress - Common 2.9.3 ...................... SKIPPED
[INFO] Alluxio Stress - Shell 2.9.3 ....................... SKIPPED
[INFO] Alluxio Assembly 2.9.3 ............................. SKIPPED
[INFO] Alluxio Assembly - Client 2.9.3 .................... SKIPPED
[INFO] Alluxio Core - Server - Master 2.9.3 ............... SKIPPED
[INFO] Alluxio Core - Server - Proxy 2.9.3 ................ SKIPPED
[INFO] Alluxio Job Service - Server 2.9.3 ................. SKIPPED
[INFO] Alluxio Log Server 2.9.3 ........................... SKIPPED
[INFO] Alluxio Assembly - Server 2.9.3 .................... SKIPPED
[INFO] Alluxio Core - Client - HDFS3 2.9.3 ................ SKIPPED
[INFO] Alluxio Integration - Tools 2.9.3 .................. SKIPPED
[INFO] Alluxio Integration - Tools - HMS 2.9.3 ............ SKIPPED
[INFO] Alluxio Integration - Validation Tools 2.9.3 ....... SKIPPED
[INFO] Alluxio MiniCluster 2.9.3 .......................... SKIPPED
[INFO] Alluxio Tests 2.9.3 ................................ SKIPPED
[INFO] Alluxio Microbenchmarks 2.9.3 ...................... SKIPPED
[INFO] Alluxio Table 2.9.3 ................................ SKIPPED
[INFO] Alluxio Table - Base Module 2.9.3 .................. SKIPPED
[INFO] Alluxio Table - Client 2.9.3 ....................... SKIPPED
[INFO] Alluxio Shaded Libraries - Client 2.9.3 ............ SKIPPED
[INFO] Alluxio Shaded Libraries - Hadoop3 Client 2.9.3 .... SKIPPED
[INFO] Alluxio Table - Server 2.9.3 ....................... SKIPPED
[INFO] Alluxio Table - Server - Common 2.9.3 .............. SKIPPED
[INFO] Alluxio Table - Server - Master 2.9.3 .............. SKIPPED
[INFO] Alluxio Table - Server - UnderDB 2.9.3 ............. SKIPPED
[INFO] Alluxio Table - Server - UnderDB - Hive 2.9.3 ...... SKIPPED
[INFO] Alluxio Table - Server - UnderDB - Glue 2.9.3 ...... SKIPPED
[INFO] Alluxio Table - Shell 2.9.3 ........................ SKIPPED
[INFO] Alluxio Under File System - Microsoft Azure DataLake Gen 2 2.9.3 SKIPPED
[INFO] Alluxio Under File System - Microsoft Azure DataLake 2.9.3 SKIPPED
[INFO] Alluxio Under File System - CephFS 2.9.3 ........... SKIPPED
[INFO] Alluxio Under File System - Cephfs-hadoop 2.9.3 .... SKIPPED
[INFO] Alluxio Under File System - Tencent Cloud COS 2.9.3  SKIPPED
[INFO] Alluxio Under File System - Tencent Cloud COSN 2.9.3 SKIPPED
[INFO] Alluxio Under File System - GCS 2.9.3 .............. SKIPPED
[INFO] Alluxio Under File System - Qiniu Kodo 2.9.3 ....... SKIPPED
[INFO] Alluxio Under File System - Aliyun OSS 2.9.3 ....... SKIPPED
[INFO] Alluxio Under File System - Apache Ozone 2.9.3 ..... SKIPPED
[INFO] Alluxio Under File System - Swift 2.9.3 ............ SKIPPED
[INFO] Alluxio Under File System - Microsoft Azure Blob Storage 2.9.3 SKIPPED
[INFO] Alluxio Under File System - Web 2.9.3 .............. SKIPPED
[INFO] Alluxio Under File System - Huawei OBS 2.9.3 ....... SKIPPED
[INFO] Alluxio UI 2.9.3 ................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  15:11 min
[INFO] Finished at: 2024-09-19T09:12:31+08:00
[INFO] ------------------------------------------------------------------------
[WARNING] The requested profile "yarn" could not be activated because it does not exist.
[ERROR] Failed to execute goal com.mycila:license-maven-plugin:4.0.rc1:check (default) on project alluxio-integration: Some files do not have the expected license header -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.mycila:license-maven-plugin:4.0.rc1:check (default) on project alluxio-integration: Some files do not have the expected license header
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:375)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:299)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:193)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:106)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:963)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:296)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:199)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: org.apache.maven.plugin.MojoExecutionException: Some files do not have the expected license header
    at com.mycila.maven.plugin.license.LicenseCheckMojo.execute (LicenseCheckMojo.java:74)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:370)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:299)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:193)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:106)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:963)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:296)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:199)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <args> -rf :alluxio-integration

license-maven-plugin 是一个用来检查和管理项目中许可证头的插件。此错误表示在代码中的某些文件缺少预期的许可证声明头，导致 Maven 构建失败。

错误信息：

[ERROR] Failed to execute goal com.mycila:license-maven-plugin:4.0.rc1:check (default) on project alluxio-integration: Some files do not have the expected license header

错误原因：

项目中的部分文件没有指定的许可证头，违反了构建规则。
文件格式或文件路径被插件误认为需要许可证头，但实际不需要（如生成的代码或第三方依赖文件）。

2️⃣ 解决方案 💡

方案 1: 跳过许可证检查

通过配置 pom.xml 或在构建命令中跳过许可证检查，快速解决问题。

在这里插入图片描述

配置示例：

<!--

    The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
    (the "License"). You may not use this work except in compliance with the License, which is
    available at www.apache.org/licenses/LICENSE-2.0

    This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
    either express or implied, as more fully set forth in the License.

    See the NOTICE file distributed with this work for information regarding copyright ownership.

-->
<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>
  <parent>
    <groupId>org.alluxio</groupId>
    <artifactId>alluxio-parent</artifactId>
    <version>2.9.3</version>
  </parent>
  <artifactId>alluxio-integration</artifactId>
  <packaging>pom</packaging>
  <name>Alluxio Integration</name>
  <description>Parent POM for different integrations with Alluxio</description>
  <modules>
    <!-- exclude checker from hadoop-1 profile as yarn is not available in Hadoop 1.x -->
    <module>fuse</module>
    <module>jnifuse</module>
    <module>tools</module>
  </modules>

  <properties>
    <!-- The following paths need to be defined here as well as in the parent pom so that mvn can -->
    <!-- run properly from sub-project directories -->
    <build.path>${project.parent.basedir}/build</build.path>
  </properties>
  <build>
    <plugins>
      <plugin>
        <groupId>com.mycila</groupId>
        <artifactId>license-maven-plugin</artifactId>
        <configuration>
          <skip>true</skip> <!-- 跳过检查 -->
          <excludes>
            <exclude>kubernetes/operator/alluxio/hack/boilerplate.go.txt</exclude>
          </excludes>
          <mapping>
            <alluxio>SCRIPT_STYLE</alluxio>
            <go>SLASHSTAR_STYLE</go>
            <java>SLASHSTAR_STYLE</java>
            <tsx>SLASHSTAR_STYLE</tsx>
            <scss>SLASHSTAR_STYLE</scss>
            <properties.template>SCRIPT_STYLE</properties.template>
            <sh.template>SCRIPT_STYLE</sh.template>
            <workers>SCRIPT_STYLE</workers>
            <xml.template>XML_STYLE</xml.template>
          </mapping>
          <useDefaultMapping>true</useDefaultMapping>
          <strictCheck>true</strictCheck>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

命令行跳过：

mvn package -Dlicense.skip=true

方案 2: 自动添加许可证头

利用 mvn license:format 自动为项目中的所有文件添加正确的许可证头，保证项目合规。

命令：

mvn license:format

方案 3: 排除特定文件

配置 pom.xml，排除特定文件或文件夹，不对这些文件执行许可证检查。

配置示例：

<plugin>
  <groupId>com.mycila</groupId>
  <artifactId>license-maven-plugin</artifactId>
  <configuration>
    <excludes>
      <exclude>**/*.txt</exclude> <!-- 排除指定文件 -->
      <exclude>src/generated-sources/**</exclude> <!-- 排除生成的代码 -->
    </excludes>
  </configuration>
</plugin>

方案 4: 降低严格性

通过设置 strictCheck 为 false，减少对许可证头的严格要求，允许部分文件没有许可证头。

配置示例：

<plugin>
  <groupId>com.mycila</groupId>
  <artifactId>license-maven-plugin</artifactId>
  <configuration>
    <strictCheck>false</strictCheck> <!-- 降低严格性 -->
  </configuration>
</plugin>