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  1. Pig
  2. PIG-1824

Support import modules in Jython UDF

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 0.8.0, 0.9.0
    • 0.10.0
    • None
    • None
    • Reviewed
    • Hide
      module import state is determined before and after user code is executed. The resolved modules are inspected and added to the pigContext, then they are added to the job jar.

      this patch addresses the following import modes:
      - import re, which will (if configured) find re on the filesystem in the jython install root
      - import foo (which can import bar), this works now provided bar is resolvable JYTHON_HOME, JYTHONPATH, curdir, etc.
      - from pkg import *, which works when the cachedir is writable
      - import non.jvm.class, which works when the cachedir is writable
      - the directly imported module may use schema decorators, but recursively imported modules cannot until PIG-1943 is addressed
      Show
      module import state is determined before and after user code is executed. The resolved modules are inspected and added to the pigContext, then they are added to the job jar. this patch addresses the following import modes: - import re, which will (if configured) find re on the filesystem in the jython install root - import foo (which can import bar), this works now provided bar is resolvable JYTHON_HOME, JYTHONPATH, curdir, etc. - from pkg import *, which works when the cachedir is writable - import non.jvm.class, which works when the cachedir is writable - the directly imported module may use schema decorators, but recursively imported modules cannot until PIG-1943 is addressed
    • jython, import

    Description

      Currently, Jython UDF script doesn't support Jython import statement as in the following example:

      #!/usr/bin/python

import re
@outputSchema("word:chararray")
def resplit(content, regex, index):
        return re.compile(regex).split(content)[index]

      Can Pig automatically locate the Jython module file and ship it to the backend? Or should we add a ship clause to let user explicitly specify the module to ship?

      Attachments

        1. 1824_final.patch
          30 kB
          Woody Anderson
        2. 1824.patch
          24 kB
          Woody Anderson
        3. 1824a.patch
          23 kB
          Woody Anderson
        4. 1824b.patch
          28 kB
          Woody Anderson
        5. 1824c.patch
          28 kB
          Woody Anderson
        6. 1824d.patch
          28 kB
          Woody Anderson
        7. 1824x.patch
          30 kB
          Woody Anderson
        8. TEST-org.apache.pig.test.TestGrunt.txt
          1.09 MB
          Alan Gates
        9. TEST-org.apache.pig.test.TestScriptLanguage.txt
          898 kB
          Alan Gates
        10. TEST-org.apache.pig.test.TestScriptUDF.txt
          192 kB
          Alan Gates

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. PIG-2433 Jython import module not working if module path is in classpath

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. PIG-2665 Bundled Jython jar in Pig 0.10.0-RC breaks module import in Python scripts with embedded Pig Latin

          • Major - Major loss of function.
          • Closed

          Activity

            People

              woody.anderson@gmail.com Woody Anderson
              rding Richard Ding
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              Dates

                Created:
                Updated:
                Resolved: