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  1. Pig
  2. PIG-2793

Make Pig Work on Windows without Cygwin


    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.12.0
    • Component/s: None
    • Labels:
    • Environment:

      Windows without Cygwin as a whole, but with some key binaries such as perl, diff, gawk, gzip, sed.

    • Hadoop Flags:


      For pig to really work well on Windows, it needs hadoop core changes. Right now, those are in progress in branch-1-win. For this work, I am running Pig on Windows against branch-1-win and removing Cygwin dependencies as capabilities open up. Branch-1-win is fairly stable now, and has opened up enough functionality to see the few things needed in Pig to run E2E on top of a cross-platform Hadoop core without Cygwin. This uber-JIRA should track the whole of the work to get pig running well on Windows without Cygwin.

      There are a few types of work that I think are needed right now (will break-out sub-jiras to track them):

      1.) Tests that generate pig script strings with paths in them (e.g. dynamically build load/store commands) need to have Pig escape ("\") characters encoded – as they can now occur in both Hadoop and local paths.

      2.) Tests that generate local temporary files with createTempFile, and then try to use those as HDFS paths need to remove ":" from the generated file name to create valid HDFS paths.

      3.) Tests that hand-generate URIs via string concatenation (e.g. "file:" + strFileName) need to use Util.generateURI instead to get a valid URI for the target platform.

      4.) Tests that assume the first line in a script (e.g. #!/bin/sh) auto-resolves interpreters need to explicitly call the interpreter (e.g. instead of calling "perlscript.pl" they should call "perl perlscript.pl".

      5.) Changes in quotes or command syntax between shells (e.g. " or ', dir or ls) need to be tuned a little here and there.


      1.) The streaming interface needs to be fixed to run without a Cygwin dependency.

      2.) The pig.additional.jars separator is currently hardcoded to ":", and should be File.pathSeparator instead (":" on linux, ";" on Windows) to be able to accept Windows paths (C:\file.jar for instance).

      3.) The Grunt "sh" command highly surfaces the behavior of the exec API. If you use a built-in, it fails with file not found. This surfaces a lot of differences in shell implementation differences (e.g. ls is an exe, but dir is builtin) – and many of the cases in TestGrunt end up running (sh bash -c "command"). For portability and ease of use, sh should actually exec "sh -c <command> on Linux and "cmd /C <command>" on Windows to improve usability and make it possible to use aliases and bat files on either platform to make the interface more platform independent to end-users.

      4.) (eventual) Update Pig's dependencies to pick up a stable Hadoop core that runs on Windows from a release branch.

        Issue Links

        Pig test: add utils to simplify testing on Windows Sub-task Closed John Gordon
        Fix test cases that generate pig scripts with "load " + pathStr to encode "\" in the path Sub-task Closed John Gordon
        Local temporary paths are not always valid HDFS path names. Sub-task Closed John Gordon
        Tests should not create their own file URIs through string concatenation, should use Util.generateURI instead Sub-task Closed John Gordon
        pig streaming tests assume interpreters are auto-resolved Sub-task Closed John Gordon
        Update pig streaming interface to run correctly on Windows without Cygwin Sub-task Resolved John Gordon
        pig.additional.jars path separator should align with File.pathSeparator instead of being hard-coded to ":" Sub-task Closed John Gordon
        grunt "sh" command should invoke the shell implicitly instead of calling exec directly with the command tokens Sub-task Closed John Gordon
        DevTests, Refactor Windows checks to use new Util.WINDOWS method for code health Sub-task Closed John Gordon
        DevTests, TestLoad has a false failure on Windows Sub-task Closed John Gordon
        "which" utility does not exist on Windows Sub-task Closed Daniel Dai
        TestParamSubPreproc still depends on "bash" to run Sub-task Resolved Daniel Dai
        Fix bunch of Pig e2e tests on Windows Sub-task Closed Daniel Dai
        Invalid cache specification for some streaming statement Sub-task Closed Daniel Dai
        TetsScriptUDF fail due to volume prefix in jar Sub-task Resolved Daniel Dai
        Pig tests do not appear to have a logger attached Sub-task Closed Daniel Dai
        Add a pig.cmd for Pig to run under Windows Sub-task Closed Daniel Dai
        Increase the timeout for unit test Sub-task Closed Daniel Dai
        TestEmptyInputDir unit test - hadoop version detection logic is brittle Sub-task Resolved John Gordon
        TestPruneColumn unit test - SimpleEchoStreamingCommand perl inline script needs simplification Sub-task Closed David Wannemacher
        Pig checked-in baseline comparisons need a pre-filter to address OS-specific newline differences Sub-task Closed David Wannemacher
        pigTest unit test needs a newline filter for comparisons of golden multi-line Sub-task Closed John Gordon
        testGrunt dev test needs some command filters to run correctly without cygwin Sub-task Closed John Gordon
        TestTypeCheckingValidatorNewLP has some path reference issues for cross-platform execution Sub-task Closed John Gordon
        TestBZip fail on Windows due to new line character Sub-task Resolved Daniel Dai
        TestMacroExpansion has some invocations of perl scripts without explicitly invoking perl as the interpreter Sub-task Resolved Daniel Dai
        TestRegisteredJarVisibility tries to copy a local file to HDFS with the full path name including ":" Sub-task Resolved Daniel Dai
        Native Windows Compatibility for Pig E2E Tests and Harness Sub-task Closed Tony Murphy
        TestExampleGenerator fails on Windows because of lack of file name escaping Sub-task Closed David Wannemacher
        Fix remaining Windows core unit test failures Sub-task Closed Daniel Dai
        Fix Windows piggybank unit test failures Sub-task Closed Daniel Dai
        Fix remaining Window e2e tests Sub-task Closed Daniel Dai


          daijy Daniel Dai added a comment -

          All underlining Jiras are solved.

          daijy Daniel Dai added a comment - All underlining Jiras are solved.
          jgordon John Gordon added a comment -

          Initial effort to get Pig running on Windows under Cygwin.

          jgordon John Gordon added a comment - Initial effort to get Pig running on Windows under Cygwin.


            • Assignee:
              daijy Daniel Dai
              jgordon John Gordon
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