Maven GAE无法执行com.google.appengine目标：appengine-maven-plugin：1.9.12：devserver [...] NoSuchElementException [英] Maven GAE Failed to execute goal com.google.appengine:appengine-maven-plugin:1.9.12:devserver [...] NoSuchElementException

问题描述

pom.xml
https://github.com/Brkk/text-share/blob/master/pom.xml

web.xml
https://github.com/Brkk/text-share/blob/master/src/main/webapp/WEB-INF/web.xml

Maven正在生成

  [INFO]扫描项目... 
 [INFO] 
 [INFO]使用构建器org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder，线程数为1 
 [INFO] 
 [信息] ------------------------------------------------ ------------------------ 
 [INFO]构建文本共享1.0-SNAPSHOT 
 [INFO] ----- -------------------------------------------------- --- -------------- 
 [INFO] 
 [INFO]>>> appengine-maven-plugin：1.9.12：devserver（default-cli）@ text-share>>> 
 [INFO] 
 [INFO] --- maven-resources-plugin：2.6：resources（default-resources）@ text-share --- 
 [INFO]使用'UTF-8 '编码来复制过滤的资源。 
 [INFO]跳过不存在的resourceDirectory / Users / paulotabarro / Desktop / workspace / text-share / src / main / resources 
 [INFO] 
 [INFO] --- maven-compiler-插件：3.1：compile（default-compile）@ text-share --- 
 [INFO]没有编译 - 所有类都是最新的
 [INFO] 
 [INFO]  -  -  maven-resources-plugin：2.6：testResources（default-testResources）@ text-share --- 
 [INFO]使用'UTF-8'编码来复制过滤的资源。 
 [INFO]跳过不存在的resourceDirectory / Users / paulotabarro / Desktop / workspace / text-share / src / test / resources 
 [INFO] 
 [INFO] --- maven-compiler-插件：3.1：testCompile（default-testCompile）@ text-share --- 
 [INFO]没有编译 - 所有类都是最新的
 [INFO] 
 [INFO]  -  -  maven-surefire-plugin：2.12.4：test（default-test）@ text-share --- 
 [INFO] 
 [INFO] --- maven-war-plugin：2.4：war （default-war）@ text-share --- 
 [INFO]打包webapp 
 [INFO]在[/ Users / paulotabarro / Desktop / workspace / text-share /目标/文本共享1.0-SNAPSHOT] 
 [INFO]处理战争项目
 [INFO]复制webapp webResources [/ Users / paulotabarro / Desktop / workspace / text-share / src / main / webapp / WEB-INF]到[/Users/paulotabarro/Desktop/workspace/text-share/target/text-share-1.0-SNAPSHOT] 
 [INFO]复制webapp资源[/ Users / paulotabarro / Desktop / workspace / text -share / src / main / webapp] 
 [INFO] Webapp组装在[101毫秒] 
 [INFO]建筑战争：/Users/paulotabarro/Desktop/workspace/text-share/target/text-share-1.0-SNAPSHOT.war 
 [INFO] 
 [INFO]< ;<< appengine-maven-plugin：1.9.12：devserver（default-cli）@ text-share<<< 
 [INFO] 
 [INFO] --- appengine-maven-plugin：1.9.12：devserver（default-cli）@ text-share --- 
 [INFO] 
 [INFO] Google App Engine Java SDK  - 运行开发服务器
 [INFO] 
 [INFO]从Maven检索Google App Engine Java SDK 
 [INFO] -------- -------------------------------------------------- -------------- 
 [INFO] BUILD FAILURE 
 [INFO] -------------------- -------------------------------------------------- -  
 [INFO]总时间：4.692 s 
 [INFO]完成于：2014-10-14T19：12：13-08：00 
 [INFO] Final Memory：16M / 184M 
 [INFO] ------------------------------------------- ----------------------------- 
 [错误]执行com.google.appengine目标失败：appengine-maven- plugin：1.9.12：项目文本共享上的devserver（default-cli）：执行com.google.appengine目标的default-cli：appengine-maven-plugin：1.9.12：devserver失败。 NoSuchElementException  - > [帮助1] 
 [ERROR] 
 [ERROR]要查看错误的完整堆栈跟踪，请使用-e开关重新运行Maven。 
 [ERROR]使用-X开关重新运行Maven以启用完整的调试日志记录。 
 [ERROR] 
 [ERROR]有关错误和可能的解决方案的更多信息，请阅读以下文章：
 [错误] [帮助1] http://cwiki.apache.org / confluence / display / MAVEN / PluginExecutionException 
  

解决方案

根据这个页面， https://code.google.com/p / appengine-maven-plugin / issues / detail？id = 41 ，您不仅需要在< build>< pluginManagement> 部分，但也在< build>< plugins> 部分。所以你需要扩展你的pom如下：

 < build> 
< outputDirectory> $ {project.build.directory} / $ {project.build.finalName} / WEB-INF / classes< / outputDirectory> 
< pluginManagement> 
<！ - 其他插件在这里 - > 
< plugin> 
< groupId> com.google.appengine< / groupId> 
< artifactId> appengine-maven-plugin< / artifactId> 
< version> 1.9.12< / version> 
< configuration> 
< enableJarClasses> false< / enableJarClasses> 
< / configuration> 
< / plugin> 
< / pluginManagement> 
< plugins> 
< plugin> 
< groupId> com.google.appengine< / groupId> 
< artifactId> appengine-maven-plugin< / artifactId> 
< / plugin> 
< / plugins> 
< / build> 
  

Maven is having this problem and none of the solutions I found worked :(.

pom.xml https://github.com/Brkk/text-share/blob/master/pom.xml

web.xml https://github.com/Brkk/text-share/blob/master/src/main/webapp/WEB-INF/web.xml

Maven is generating

[INFO] Scanning for projects...
[INFO] 
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building text-share 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] >>> appengine-maven-plugin:1.9.12:devserver (default-cli) @ text-share >>>
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ text-share ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/paulotabarro/Desktop/workspace/text-share/src/main/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ text-share ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ text-share ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/paulotabarro/Desktop/workspace/text-share/src/test/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ text-share ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ text-share ---
[INFO] 
[INFO] --- maven-war-plugin:2.4:war (default-war) @ text-share ---
[INFO] Packaging webapp
[INFO] Assembling webapp [text-share] in [/Users/paulotabarro/Desktop/workspace/text-share/target/text-share-1.0-SNAPSHOT]
[INFO] Processing war project
[INFO] Copying webapp webResources [/Users/paulotabarro/Desktop/workspace/text-share/src/main/webapp/WEB-INF] to [/Users/paulotabarro/Desktop/workspace/text-share/target/text-share-1.0-SNAPSHOT]
[INFO] Copying webapp resources [/Users/paulotabarro/Desktop/workspace/text-share/src/main/webapp]
[INFO] Webapp assembled in [101 msecs]
[INFO] Building war: /Users/paulotabarro/Desktop/workspace/text-share/target/text-share-1.0-SNAPSHOT.war
[INFO] 
[INFO] <<< appengine-maven-plugin:1.9.12:devserver (default-cli) @ text-share <<<
[INFO] 
[INFO] --- appengine-maven-plugin:1.9.12:devserver (default-cli) @ text-share ---
[INFO] 
[INFO] Google App Engine Java SDK - Running Development Server
[INFO] 
[INFO] Retrieving Google App Engine Java SDK from Maven
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.692 s
[INFO] Finished at: 2014-10-14T19:12:13-08:00
[INFO] Final Memory: 16M/184M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.google.appengine:appengine-maven-plugin:1.9.12:devserver (default-cli) on project text-share: Execution default-cli of goal com.google.appengine:appengine-maven-plugin:1.9.12:devserver failed. NoSuchElementException -> [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/PluginExecutionException

解决方案

According to this page, https://code.google.com/p/appengine-maven-plugin/issues/detail?id=41 , you need to add the plugin not only in the <build><pluginManagement> section, but also in the <build><plugins> section. So you would need to extend your pom as follows:

<build>
    <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
    <pluginManagement>
        <!-- other plugins here -->
        <plugin>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-maven-plugin</artifactId>
            <version>1.9.12</version>
            <configuration>
                <enableJarClasses>false</enableJarClasses>
            </configuration>
        </plugin>
    </pluginManagement>
    <plugins>
        <plugin>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

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