为什么Maven强制实施程序插件在Maven 3.6.1版中失败，但在3.6.2中通过？

分类：编程问答

如何解决为什么Maven强制实施程序插件在Maven 3.6.1版中失败，但在3.6.2中通过？

在我的一个项目中，我试图将DependencyConvergence规则与maven强制执行器插件一起使用。我观察到，如果我使用Maven 3.6.1，则强制执行程序将失败，并出现以下错误，但在maven 3.6.2中，该命令正常运行。

有人可以让我知道Maven 3.6.2中的哪些更改导致Debrajs-MacBook-Air:es-plugins debrajmanna$ java -version java version "1.8.0_171" Java(TM) SE Runtime Environment (build 1.8.0_171-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11,mixed mode) 在3.6.2中通过但在其他低于3.6.2的Maven版本中失败吗？

我在GitHub上放置了一个示例项目，可以在其中复制该问题。

Debrajs-MacBook-Air:es-plugins debrajmanna$ ~/Downloads/apache-maven-3.6.1/bin/mvn validate
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] es-plugins                                                         [pom]
[INFO] dedup                                                              [jar]
[INFO]
[INFO] -----------------------< org.example:es-plugins >-----------------------
[INFO] Building es-plugins 1.0-SNAPSHOT                                   [1/2]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- maven-enforcer-plugin:3.0.0-M2:enforce (javaversion-dependencyconvergence) @ es-plugins ---
[INFO]
[INFO] -------------------------< org.example:dedup >--------------------------
[INFO] Building dedup 1.0-SNAPSHOT                                        [2/2]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-enforcer-plugin:3.0.0-M2:enforce (javaversion-dependencyconvergence) @ dedup ---
[WARNING]
Dependency convergence error for com.carrotsearch.randomizedtesting:randomizedtesting-runner:2.7.1 paths to dependency are:
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-com.carrotsearch.randomizedtesting:randomizedtesting-runner:2.7.1
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.apache.lucene:lucene-test-framework:8.5.1
      +-com.carrotsearch.randomizedtesting:randomizedtesting-runner:2.7.2

[WARNING]
Dependency convergence error for commons-logging:commons-logging:1.2 paths to dependency are:
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-org.apache.httpcomponents:httpclient:4.5.10
        +-commons-logging:commons-logging:1.2
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-org.apache.httpcomponents:httpasyncclient:4.1.4
        +-commons-logging:commons-logging:1.2
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-commons-logging:commons-logging:1.1.3
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client-sniffer:7.7.1
      +-commons-logging:commons-logging:1.1.3
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-commons-logging:commons-logging:1.1.3

[WARNING]
Dependency convergence error for org.apache.httpcomponents:httpcore:4.4.12 paths to dependency are:
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-org.apache.httpcomponents:httpclient:4.5.10
        +-org.apache.httpcomponents:httpcore:4.4.12
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-org.apache.httpcomponents:httpcore:4.4.12
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-org.apache.httpcomponents:httpasyncclient:4.1.4
        +-org.apache.httpcomponents:httpcore:4.4.10
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client-sniffer:7.7.1
      +-org.apache.httpcomponents:httpcore:4.4.12

[WARNING]
Dependency convergence error for org.apache.httpcomponents:httpclient:4.5.10 paths to dependency are:
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-org.apache.httpcomponents:httpclient:4.5.10
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-org.apache.httpcomponents:httpasyncclient:4.1.4
        +-org.apache.httpcomponents:httpclient:4.5.6
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client-sniffer:7.7.1
      +-org.apache.httpcomponents:httpclient:4.5.10

[WARNING]
Dependency convergence error for org.apache.httpcomponents:httpcore-nio:4.4.10 paths to dependency are:
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-org.apache.httpcomponents:httpasyncclient:4.1.4
        +-org.apache.httpcomponents:httpcore-nio:4.4.10
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.elasticsearch.client:elasticsearch-rest-client:7.7.1
      +-org.apache.httpcomponents:httpcore-nio:4.4.12

[WARNING] Rule 0: org.apache.maven.plugins.enforcer.DependencyConvergence failed with message:
Failed while enforcing releasability. See above detailed error message.
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for es-plugins 1.0-SNAPSHOT:
[INFO]
[INFO] es-plugins ......................................... SUCCESS [  3.047 s]
[INFO] dedup .............................................. FAILURE [  0.856 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  4.131 s
[INFO] Finished at: 2020-08-29T11:41:55+05:30
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:3.0.0-M2:enforce (javaversion-dependencyconvergence) on project dedup: Some Enforcer rules have failed. Look above for specific messages explaining why the rule failed. -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors,re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[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 <goals> -rf :dedup

maven-enforcer-plugin-3.0.0-M2 

Debrajs-MacBook-Air:es-plugins debrajmanna$ ~/Downloads/apache-maven-3.6.2/bin/mvn validate
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] es-plugins                                                         [pom]
[INFO] dedup                                                              [jar]
[INFO]
[INFO] -----------------------< org.example:es-plugins >-----------------------
[INFO] Building es-plugins 1.0-SNAPSHOT                                   [1/2]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- maven-enforcer-plugin:3.0.0-M2:enforce (javaversion-dependencyconvergence) @ es-plugins ---
[INFO]
[INFO] -------------------------< org.example:dedup >--------------------------
[INFO] Building dedup 1.0-SNAPSHOT                                        [2/2]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-enforcer-plugin:3.0.0-M2:enforce (javaversion-dependencyconvergence) @ dedup ---
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for es-plugins 1.0-SNAPSHOT:
[INFO]
[INFO] es-plugins ......................................... SUCCESS [  1.743 s]
[INFO] dedup .............................................. SUCCESS [  0.510 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.462 s
[INFO] Finished at: 2020-08-29T11:42:06+05:30
[INFO] ------------------------------------------------------------------------

在Maven 3.6.2中也可以正常工作。

<select class="form-control select2-blue select" style="width: 100%;" name="catid" id="catid">
                                    <option selected="selected">Tanlang</option>
                                    <option id="1">0</option>
                                    <option id="2">1</option>
                                    <option id="3">3</option>
                                    <option id="4">5</option>
                                    <option id="5">6</option>
                                    <option id="6">6</option>
                                    <option id="7">10</option>
                                    <option id="8">71</option>
                                    <option id="9">72</option>
                                    <option id="10">92</option>
                                </select>


 <select class="form-control select2-blue select" style="width: 100%;" name="cat_uz" id="cat_uz">
                                    <option selected="selected">Tanlang</option>
                                    <option id="v1">SMS to'plam</option>
                                    <optgroup label="Internet">
                                    <option id="v2">Oylik</option>
                                    <option id="v3">Kunlik</option>
                                    <option id="v4">OnNet</option>
                                    <option id="v5">Tungi DRIVE</option>
                                    <option id="v6">Tungi internet</option>
                                    </optgroup>
                                    <option id="v7">Daqiqa to'plami</option>
                                    <option id="v8">Asosiy xizmatlar</option>
                                    <option id="v9">Pullik xizmatlar</option>
                                    <option id="v10">Raqam</option>
                                </select>

<select class="form-control select2-blue select" style="width: 100%;" name="cat_ru" id="cat_ru" readonly>
                                    <option selected="selected">Tanlang</option>
                                    <option id="v1">SMS-пакеты</option>
                                    <option id="v2">Месячные</option>
                                    <option id="v3">Суточные</option>
                                    <option id="v4">OnNet</option>
                                    <option id="v5">Ночной DRIVE</option>
                                    <option id="v6">Ночные</option>
                                    <option id="v7">Пакеты минут</option>
                                    <option id="v8">Базовые  услуги</option>
                                    <option id="v9">Платные услуги</option>
                                    <option id="v10">Номер</option>
                                </select>

解决方法

它与MENFORCER-195和MNG-6713有关，它们是Maven 3.6.2中修复的错误。

如果您使用的是3.6.2，请注意，因为此区域中有a further regression，直到3.6.3才被修复（不会影响您的示例）。

我如何找到这些票证

让我们分别查看每个失败。从第一个开始就很有意义：

Dependency convergence error for com.carrotsearch.randomizedtesting:randomizedtesting-runner:2.7.1 paths to dependency are:
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-com.carrotsearch.randomizedtesting:randomizedtesting-runner:2.7.1
and
+-org.example:dedup:1.0-SNAPSHOT
  +-org.elasticsearch.test:framework:7.7.1
    +-org.apache.lucene:lucene-test-framework:8.5.1
      +-com.carrotsearch.randomizedtesting:randomizedtesting-runner:2.7.2

让我们看一下org.elasticsearch.test:framework's POM的相关部分：

<dependency>
    <groupId>com.carrotsearch.randomizedtesting</groupId>
    <artifactId>randomizedtesting-runner</artifactId>
    <version>2.7.1</version>
    <scope>compile</scope>
    <exclusions>
        <exclusion>
            <artifactId>*</artifactId>
            <groupId>*</groupId>
        </exclusion>
    </exclusions>
</dependency>

<dependency>
    <groupId>org.apache.lucene</groupId>
    <artifactId>lucene-test-framework</artifactId>
    <version>8.5.1</version>
    <scope>compile</scope>
    <exclusions>
        <exclusion>
          <artifactId>*</artifactId>
          <groupId>*</groupId>
      </exclusion>
    </exclusions>
</dependency>

很明显，我们可以看到应该排除Lucene的所有传递依赖。但是，如果我们返回错误的这一部分，则Enforcer插件抱怨的2.7.2版本甚至不应该在依赖树中！

...
   +-org.apache.lucene:lucene-test-framework:8.5.1
        +-com.carrotsearch.randomizedtesting:randomizedtesting-runner:2.7.2

当我为两个版本的Maven（3.6.1和3.6.2）打印Maven依赖关系树时，我看到的randomizedtesting-runner的唯一实例是2.7.1版本，因此有些混乱在这里。

我的直觉告诉我，通配符排除很可能是罪魁祸首，因此从那里搜索the release notes只是诸如“排除”或“通配符”之类的问题。原来我是对的。

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