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2022-12-18
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org.apache.commons.io does not exist

# 🚀 解决 Ambari Infra 中 package org.apache.commons.io does not exist 错误问题

在使用 Ambari Infra 构建和部署大数据集群时，可能会遇到类似如下的编译错误信息：

[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/commands/EnableKerberosPluginSolrZkCommand.java:[22,29] package org.apache.commons.io does not exist
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/commands/SetAutoScalingZkCommand.java:[29,29] package org.apache.commons.io does not exist
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/S3Uploader.java:[24,29] package org.apache.commons.io does not exist
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/commands/EnableKerberosPluginSolrZkCommand.java:[83,14] cannot find symbol
  symbol:   variable FileUtils
  location: class org.apache.ambari.infra.solr.commands.EnableKerberosPluginSolrZkCommand
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/commands/SetAutoScalingZkCommand.java:[52,30] cannot find symbol
  symbol:   variable FileUtils
  location: class org.apache.ambari.infra.solr.commands.SetAutoScalingZkCommand
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/S3Uploader.java:[40,31] cannot find symbol
  symbol:   variable FileUtils
  location: class org.apache.ambari.infra.solr.S3Uploader
[INFO] 6 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for ambari-infra 3.0.0.0-SNAPSHOT:
[INFO]
[INFO] ambari-infra ....................................... SUCCESS [  1.742 s]
[INFO] Ambari Infra Solr Client ........................... FAILURE [  3.038 s]
[INFO] Ambari Infra Solr Plugin ........................... SKIPPED
[INFO] Ambari Infra Manager ............................... SKIPPED
[INFO] Ambari Infra Assembly .............................. SKIPPED
[INFO] Ambari Infra Manager Integration Tests ............. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  4.865 s
[INFO] Finished at: 2024-09-29T08:56:48Z
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.3:compile (default-compile) on project ambari-infra-solr-client: Compilation failure: Compilation failure:
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/commands/EnableKerberosPluginSolrZkCommand.java:[22,29] package org.apache.commons.io does not exist
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/commands/SetAutoScalingZkCommand.java:[29,29] package org.apache.commons.io does not exist
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/S3Uploader.java:[24,29] package org.apache.commons.io does not exist
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/commands/EnableKerberosPluginSolrZkCommand.java:[83,14] cannot find symbol
[ERROR]   symbol:   variable FileUtils
[ERROR]   location: class org.apache.ambari.infra.solr.commands.EnableKerberosPluginSolrZkCommand
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/commands/SetAutoScalingZkCommand.java:[52,30] cannot find symbol
[ERROR]   symbol:   variable FileUtils
[ERROR]   location: class org.apache.ambari.infra.solr.commands.SetAutoScalingZkCommand
[ERROR] /opt/modules/ambari-infra/ambari-infra-solr-client/src/main/java/org/apache/ambari/infra/solr/S3Uploader.java:[40,31] cannot find symbol
[ERROR]   symbol:   variable FileUtils
[ERROR]   location: class org.apache.ambari.infra.solr.S3Uploader
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.3:compile (default-compile) on project ambari-infra-solr-client: Compilation f
ailure
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    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:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    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.compiler.CompilationFailureException: Compilation failure
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute (AbstractCompilerMojo.java:911)
    at org.apache.maven.plugin.compiler.CompilerMojo.execute (CompilerMojo.java:129)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    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:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    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/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <args> -rf :ambari-infra-solr-client
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该错误表明，代码中引用了 org.apache.commons.io 包，但系统并未找到对应的类文件。具体来说，错误通常出现在以下几个方面：

  • FileUtils 类无法找到，导致项目无法编译。
  • 缺少 Apache Commons IO 依赖，导致相关的类路径未能正确加载。

本篇文章将指导你一步步解决该问题，确保能够顺利进行 Ambari Infra 项目的编译。

# 问题分析 🔍

  1. 缺少依赖 📦
    错误日志中提到，找不到 org.apache.commons.io 包，通常是因为项目没有在 pom.xml 文件中正确声明 Apache Commons IO 依赖。这会导致在编译过程中，FileUtils 等类无法被识别。

  2. 无法解析符号 ❌
    当编译器无法解析类或符号时，这通常表明缺少相关依赖包。此时，Maven 无法从远程仓库或本地仓库加载依赖，导致编译失败。

# 解决方案 💡

# 1️⃣ 检查并添加 Apache Commons IO 依赖

为了确保项目能够顺利编译，首先需要在 pom.xml 中添加 Apache Commons IO 的依赖。具体步骤如下：

  • 打开项目的 pom.xml 文件。
  • 在 <dependencies> 部分，添加以下依赖项：

image-20240929172034684


<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.8.0</version>
</dependency>
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commons-io 是一个常用的 Java IO 工具库，它提供了许多便捷的文件操作方法，如 FileUtils 类。在添加完该依赖后，保存并关闭 pom.xml 文件。

# 2️⃣ 重新编译项目

依赖添加成功后，打开命令行，进入项目根目录，执行以下命令重新编译项目：

mvn clean install
1

此命令将清除目标文件夹，重新编译并构建项目。确保 Apache Commons IO 库能够成功加载，并在编译时不再出现缺失类的错误。

# 3️⃣ 验证依赖是否成功加载

为了确认 commons-io 依赖是否已成功下载并包含在项目中，可以使用 Maven 提供的命令查看依赖树：

mvn dependency:tree
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执行该命令后，Maven 会展示项目的依赖树，检查其中是否包含 commons-io。如果依赖显示在列表中，说明依赖已正确加载。

# 4️⃣ 清理本地 Maven 缓存

如果以上步骤都已完成，但错误依然存在，可以尝试清理本地 Maven 仓库缓存，并强制 Maven 从远程仓库重新下载所有依赖。执行以下命令：

mvn clean -U
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该命令将清理 Maven 本地仓库的缓存并强制更新项目中的所有依赖。这对于解决因缓存问题导致的依赖加载失败尤为有效。

#Ambari#Maven#Java
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maven-compiler-plugin:3.3:compile

← maven-compiler-plugin:3.3:compile→

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