我们已经升级到 SonarQube 5.1 并使用 Maven 分析我们庞大的多模块项目。虽然多次运行分析是成功的，但有些日子我们现在得到：
[ERROR] Failed to execute goal org.codehaus.mojo:sonar-maven-plugin:2.6:sonar (default-cli) on project jahia-dev-root: The SQALE density value should be between 0 and 1.7976931348623157E308 and got -0.004 -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:sonar-maven-plugin:2.6:sonar (default-cli) on project jahia-dev-root: The SQALE density value should be between 0 and 1.7976931348623157E308 and got -0.004
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
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:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
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:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: The SQALE density value should be between 0 and 1.7976931348623157E308 and got -0.004
at org.codehaus.mojo.sonar.bootstrap.ExceptionHandling.handle(ExceptionHandling.java:41)
at org.codehaus.mojo.sonar.bootstrap.RunnerBootstraper.execute(RunnerBootstraper.java:139)
at org.codehaus.mojo.sonar.SonarMojo.execute(SonarMojo.java:132)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 19 more
Caused by: The SQALE density value should be between 0 and 1.7976931348623157E308 and got -0.004
从日志中分析的最后一个子模块是一个没有 java 文件的 webapp，只有 groovy、jsp、javascript 和 xml 文件。任何人都有一个想法，如果有解决方法或如何继续解决该问题？上周我们已将插件升级到 Java 3.3、Groovy 1.1.1、XML 1.3。会不会有关系？
更新 14.07.2015：我发现在激活 0 条规则的情况下切换到默认 XML 配置文件解决了这个问题。在我激活以下 XML 规则之前：
- 换行符应该跟在每个元素之后
- 源代码应一致缩进
- 不应使用制表符
我仍然不知道为什么激活这些 XML 规则会遇到该异常。