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[已解决]CentOS 5.5 apache ivy 安装后ant不能找到ivy task

时间：2010-08-11

来源：互联网

本帖最后由可可火山于 2010-08-13 12:10 编辑

尝试下载了最新的ant 1.8，ivy运行正常，可能是CentOS 源里的ant有些配置上的区别。

最近在学习hadoop，hadoop: the definiteve guide 一书的例子代码里用到ivy，我通过下载解压把ivy.jar放到了ANT_HOME/lib下，照理应该可以work了吧。

ant是1.65来自yum源。

现在报
htdg-examples-0.1.1/build.xml:77: Could not create task or type of type: antlib:org.apache.ivy.ant:retrieve.

以下是我的错误信息：

[user@/opt/workspace/hadoopdefiniteveguide/htdg-examples-0.1.1 (0)]$ ls /usr/share/ant/lib/
ivy.jar jsch.jar
[user@/opt/workspace/hadoopdefiniteveguide/htdg-examples-0.1.1 (0)]$ ant -version
Apache Ant version 1.6.5 compiled on January 6 2007
[user@/opt/workspace/hadoopdefiniteveguide/htdg-examples-0.1.1 (0)]$ java -version
java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02)
Java HotSpot(TM) Client VM (build 16.3-b01, mixed mode, sharing)
[user@/opt/workspace/hadoopdefiniteveguide/htdg-examples-0.1.1 (0)]$ ant
Buildfile: build.xml
init:
retrieve-dependencies:
BUILD FAILED
/opt/workspace/hadoopdefiniteveguide/htdg-examples-0.1.1/build.xml:77: Could not create task or type of type: antlib:org.apache.ivy.ant:retrieve.
Ant could not find the task or a class this task relies upon.
This is common and has a number of causes; the usual
solutions are to read the manual pages then download and
install needed JAR files, or fix the build file:
- You have misspelt 'antlib:org.apache.ivy.ant:retrieve'.
Fix: check your spelling.
- The task needs an external JAR file to execute
and this is not found at the right place in the classpath.
Fix: check the documentation for dependencies.
Fix: declare the task.
- The task is an Ant optional task and the JAR file and/or libraries
implementing the functionality were not found at the time you
yourself built your installation of Ant from the Ant sources.
Fix: Look in the ANT_HOME/lib for the 'ant-' JAR corresponding to the
task and make sure it contains more than merely a META-INF/MANIFEST.MF.
If all it contains is the manifest, then rebuild Ant with the needed
libraries present in ${ant.home}/lib/optional/ , or alternatively,
download a pre-built release version from apache.org
- The build file was written for a later version of Ant
Fix: upgrade to at least the latest release version of Ant
- The task is not an Ant core or optional task
and needs to be declared using <taskdef>.
- You are attempting to use a task defined using
<presetdef> or <macrodef> but have spelt wrong or not
defined it at the point of use
Remember that for JAR files to be visible to Ant tasks implemented
in ANT_HOME/lib, the files must be in the same directory or on the
classpath
Please neither file bug reports on this problem, nor email the
Ant mailing lists, until all of these causes have been explored,
as this is not an Ant bug.
Total time: 1 second

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