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我正在使用 maven 来构建我的项目，并使用 cobertura 来收集 UT 代码覆盖率。我的问题是当我尝试构建项目时，我遇到了下面的错误，最后我在发出命令时发现失败是由cobertura插件引起的：mvn cobertura:instrument。

[INFO] Unable to obtain CommandsFile location.
Embedded error: Permission denied

我试图通过目录，我认为我有权限。有人见过失败吗？如何调试它？

$ mvn cobertura:instrument
[INFO] Scanning for projects...
[INFO] Reactor build order: 
[INFO]   MyProject
[INFO] ------------------------------------------------------------------------
[INFO] Building XXXXXX
[INFO]    task-segment: [cobertura:instrument]
[INFO] ------------------------------------------------------------------------
[INFO] [cobertura:instrument]
[INFO] Skipping cobertura mojo for project with packaging type 'pom'
[INFO] ------------------------------------------------------------------------
[INFO] Building ato-client
[INFO]    task-segment: [cobertura:instrument]
[INFO] ------------------------------------------------------------------------
[INFO] [cobertura:instrument]
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Unable to obtain CommandsFile location.

Embedded error: Permission denied
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Unable to obtain CommandsFile location.
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:703)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:553)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:523)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:371)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:332)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:181)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:356)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:137)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:356)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
    at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
    at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
    at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: Unable to obtain CommandsFile location.
    at org.codehaus.mojo.cobertura.tasks.AbstractTask.executeJava(AbstractTask.java:195)
    at org.codehaus.mojo.cobertura.tasks.InstrumentTask.execute(InstrumentTask.java:131)
    at org.codehaus.mojo.cobertura.CoberturaInstrumentMojo.execute(CoberturaInstrumentMojo.java:145)
    at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:483)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:678)
    ... 16 more
Caused by: java.io.IOException: Permission denied
    at java.io.UnixFileSystem.createFileExclusively(Native Method)
    at java.io.File.checkAndCreate(File.java:1704)
    at java.io.File.createTempFile(File.java:1792)
    at java.io.File.createTempFile(File.java:1828)
    at net.sourceforge.cobertura.util.CommandLineBuilder.<init>(CommandLineBuilder.java:96)
    at org.codehaus.mojo.cobertura.tasks.CommandLineArguments.getCommandsFile(CommandLineArguments.java:82)
    at org.codehaus.mojo.cobertura.tasks.AbstractTask.executeJava(AbstractTask.java:191)
    ... 20 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Tue Jan 22 09:30:25 CST 2013
[INFO] Final Memory: 22M/241M
[INFO] ------------------------------------------------------------------------
4

3 回答 3

3

我认为您当前的用户没有对临时文件夹的写入权限（检查java.io.tmpdir系统属性值）：

Caused by: java.io.IOException: Permission denied 
at java.io.UnixFileSystem.createFileExclusively(Native Method) 
at java.io.File.checkAndCreate(File.java:1704) 
at java.io.File.createTempFile(File.java:1792) 
at java.io.File.createTempFile(File.java:1828) 
at net.sourceforge.cobertura.util.CommandLineBuilder.(CommandLineBuilder.java:96) 
at enter code here
于 2013-01-22T02:01:55.217 回答
2

该错误表示 java 进程的用户对临时目录 (/tmp) 没有写权限。

Java 进程会将 pid 写入临时目录中的文件。

jps/jstat 可以使用这个 pid 文件来获取 jvm 信息。

也可以看看：

于 2013-01-22T10:30:39.410 回答
0

您是否检查过用户是否有权写入 java 配置提供的标准临时文件目录？

于 2013-01-22T01:57:18.827 回答