声纳Maven插件构建错误，SonarQube版本：null

Question

我的詹金斯号建筑刚开始失败，并显示以下消息：

[INFO] --- sonar-maven-plugin:2.7:sonar (default-cli) @ cividas-core-web ---
[INFO] artifact com.ontimize:ontimize-core: checking for updates from central
[INFO] artifact com.ontimize:ontimize-core: checking for updates from imatia-local
[INFO] artifact com.ontimize:ontimize-core: checking for updates from snapshots
[INFO] User cache: /var/lib/jenkins/.sonar/cache
[INFO] SonarQube version: null
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.773s
[INFO] Finished at: Thu Oct 22 19:49:04 CEST 2015
[INFO] Final Memory: 13M/193M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:sonar-maven-plugin:2.7:sonar (default-cli) on project cividas-core-web: null: MojoExecutionException: NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:sonar-maven-plugin:2.7:sonar (default-cli) on project cividas-core-web: null
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:216)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:317)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:555)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.MojoExecutionException
    at org.codehaus.mojo.sonar.bootstrap.ExceptionHandling.handle(ExceptionHandling.java:41)
    at org.codehaus.mojo.sonar.bootstrap.RunnerBootstrapper.execute(RunnerBootstrapper.java:107)
    at org.codehaus.mojo.sonar.SonarMojo.execute(SonarMojo.java:141)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:106)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
    ... 19 more
Caused by: java.lang.NullPointerException
    at org.apache.maven.artifact.versioning.ComparableVersion.parseVersion(ComparableVersion.java:354)
    at org.apache.maven.artifact.versioning.ComparableVersion.<init>(ComparableVersion.java:345)
    at org.apache.maven.artifact.versioning.DefaultArtifactVersion.parseVersion(DefaultArtifactVersion.java:110)
    at org.apache.maven.artifact.versioning.DefaultArtifactVersion.<init>(DefaultArtifactVersion.java:46)
    at org.codehaus.mojo.sonar.bootstrap.RunnerBootstrapper.isVersionPriorTo5Dot2(RunnerBootstrapper.java:192)
    at org.codehaus.mojo.sonar.bootstrap.RunnerBootstrapper.execute(RunnerBootstrapper.java:84)
    ... 22 more
[ERROR] 
[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
Sonar analysis completed: FAILURE

这是怎么回事？

Answer 1

对于那些对 “为什么” 感兴趣的人 ，我做了更多的挖掘工作，看来正在发生的事情是这样的：

• RunnerBootstrapper尝试检查版本是否为5.2+：

• 首先，从在EmbeddedRunner中创建的启动器检索 serverVersion ，

• 使用IsolatedLauncher创建代理的实现类BatchIsolatedLauncher

• 它将尝试读取sq-version.txt包含版本的资源文件。

该sq-version.txt文件位于org.codehaus.sonar：sonar-plugin-
api中
，但此依赖关系未包含（即使是传递）在sonar-maven-
plugin中
。它在声纳方面所引用的全部是org.sonarsource.sonar-runner：sonar-
runner-api
。

他们似乎已更改版本txt文件的位置和名称，但未更新所有代码。您可能不愿意手动向插件类路径添加sq-version.txt包含内容的内容5.2（没有换行符）（可能是通过更新插件jar），或者添加了对sonar-plugin-api的依赖关系，但是这些都是黑客。

sonar-maven-plugin 2.6使用了sonar-runner 2.4，它与sonar-maven-plugin
2.7使用的2.5完全不同（sonar-runner的groupId已将 域 从
更改org.codehaus.sonar.runner为org.sonarsource.sonar-runner），因此最好坚持使用v2。
6个插件，直到他们平滑过渡并发布了更多版本。