我已经完成了以下步骤：
- 已安装Java 1.6
- 我使用的是Ubuntu 11.10。在/etc/bash.bachrc中添加了$JAVA_HOME路径
- 已安装maven。
mvn --version正在正确显示已安装的maven - 从
http://svn.apache.org/repos/asf/mahout/trunk下载Mahout
现在，我进入mahout/trunk，尝试执行mvn clean install或mvn clean install -X -e，然后它会给出以下错误-
无法执行mojo:resources。它需要一个具有pom.xml，但该构建没有使用pom.xml。
我只想试一下驯马师的例子。如何修复此错误？
目录中有一个pom.xml
完整的终端输出在这里：
+ Error stacktraces are turned on.
Apache Maven 2.2.1 (rdebian-6)
Java version: 1.6.0_23
Java home: /usr/lib/jvm/java-6-openjdk/jre
Default locale: en_IN, platform encoding: UTF-8
OS name: "linux" version: "3.0.0-16-generic" arch: "i386" Family: "unix"
[DEBUG] Building Maven user-level plugin registry from: '/home/kartikeya/.m2/plugin-registry.xml'
[DEBUG] Building Maven global-level plugin registry from: '/usr/share/maven2/conf/plugin-registry.xml'
[INFO] Scanning for projects...
[DEBUG] Wagons could not be registered as the extension container was never created
[INFO] ------------------------------------------------------------------------
[INFO] Building Maven Default Project
[INFO] task-segment: [clean, install]
[INFO] ------------------------------------------------------------------------
[DEBUG] Retrieving parent-POM: org.apache.maven.plugins:maven-plugins:pom:12 for project: null:maven-clean-plugin:maven-plugin:2.3 from the repository.
[DEBUG] Retrieving parent-POM: org.apache.maven:maven-parent:pom:9 for project: org.apache.maven.plugins:maven-plugins:pom:12 from the repository.
[DEBUG] Retrieving parent-POM: org.apache:apache:pom:4 for project: org.apache.maven:maven-parent:pom:9 from the repository.
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Cannot execute mojo: clean. It requires a project with an existing pom.xml, but the build is not using one.
[INFO] ------------------------------------------------------------------------
[DEBUG] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Cannot execute mojo: clean. It requires a project with an existing pom.xml, but the build is not using one.
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
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:616)
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: Cannot execute mojo: clean. It requires a project with an existing pom.xml, but the build is not using one.
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:414)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
... 17 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Wed Mar 21 11:32:36 IST 2012
[INFO] Final Memory: 2M/55M
[INFO] ------------------------------------------------------------------------
谢谢阿约兹维克和欧文。
我天生就安装了maven2。我采取了以下步骤来解决这个问题：
- 删除Maven2
sudo apt-get remove maven2 -
按照中的说明为ubuntu安装了Maven 3.0.4-在没有openjdk 的情况下安装maven2
-
即使在这样做之后，我也得到了错误-
Unable to locate the javac Compiler in:[ERROR] /usr/lib/jvm/java-6-openjdk/jre/../lib/tools.jar
要解决此问题，需要重新安装JDK。它对我有用！。对于那些甚至，如果这个解决方案不起作用，请看看-为什么maven忽略我的JAVA_HOME？
谨致问候。
"无法执行mojo:resources。它需要一个具有现有pom.xml的项目"
此错误意味着工作目录中没有pom.xml