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Pig-使用java實現使用者自定義函式編譯pig.jar包錯誤

從SVN庫中匯出程式碼建立本地的pig.jar檔案時報錯:
建立命令:

svn co http://svn.apache.org/repos/asf/pig/trunk
cd trunk
ant

執行 ant 時報如下錯誤:

BUILD FAILED
/home/hadoop/pig-0.17.0/logs/file/trunk/build.xml:812: The following error occurred while executing this line:
/home/hadoop/pig-0.17.0/logs/file/trunk/build.xml:1678: Can't get http://repo2.maven.org/maven2/org/apache/ivy/ivy/2.2.0/ivy-2.2.0.jar to /home/hadoop/pig-0.17.0/logs/file/trunk/ivy/ivy-2.2.0.jar

Total time: 6 seconds

解決方案:
安裝maven:

sudo apt-get install maven