Question

我想使用jython运行python函数..

以此网站为例。

http://sundaycomputing.blogspot.com/2011/01/python-udfs-from-pig-scripts.html

现在我运行脚本（pig -f myscript.pig

它返回给我这个错误

     Pig Stack Trace
---------------
ERROR 2998: Unhandled internal error. org/python/core/PyException

java.lang.NoClassDefFoundError: org/python/core/PyException
    at org.apache.pig.scripting.jython.JythonScriptEngine.registerFunctions(JythonScriptEngine.java:127)
    at org.apache.pig.PigServer.registerCode(PigServer.java:567)
    at org.apache.pig.tools.grunt.GruntParser.processRegister(GruntParser.java:421)
    at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:419)
    at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:188)
    at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:164)
    at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:81)
    at org.apache.pig.Main.run(Main.java:427)
    at org.apache.pig.Main.main(Main.java:108)
Caused by: java.lang.ClassNotFoundException: org.python.core.PyException
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 9 more
================================================================================

我猜它是因为第一行.. REGISTER udf.py USING jython AS udf;

并且我必须指定jython路径？（因为我在群集上运行此代码..我不认为我已经设置了这个东西）.. 现在......因为我不太了解java ..因此启用了python ...但是如何让这段代码运行？

我必须在我的环境中进行什么样的设置...来调试这个问题。感谢

Answer 1

将$PIG_HOME/lib/jython.jar添加到您的PIG_CLASSPATH环境变量。

使用jython运行python

1 个答案: