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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/07/03 05:43:00 UTC

[jira] [Work logged] (BEAM-12573) Bounded Source Reader DoFn PR #13154 causes some pipelines to fail with a PicklingError

     [ https://issues.apache.org/jira/browse/BEAM-12573?focusedWorklogId=618334&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-618334 ]

ASF GitHub Bot logged work on BEAM-12573:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 03/Jul/21 05:42
            Start Date: 03/Jul/21 05:42
    Worklog Time Spent: 10m 
      Work Description: tvalentyn opened a new pull request #15125:
URL: https://github.com/apache/beam/pull/15125


   
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   `ValidatesRunner` compliance status (on master branch)
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         <th>Dataflow</th>
         <th>Flink</th>
         <th>Samza</th>
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   Examples testing status on various runners
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   Post-Commit SDK/Transform Integration Tests Status (on master branch)
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   Pre-Commit Tests Status (on master branch)
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         <td>---</td>
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Issue Time Tracking
-------------------

            Worklog Id:     (was: 618334)
    Remaining Estimate: 0h
            Time Spent: 10m

> Bounded Source Reader DoFn PR #13154  causes some pipelines to fail with a PicklingError 
> -----------------------------------------------------------------------------------------
>
>                 Key: BEAM-12573
>                 URL: https://issues.apache.org/jira/browse/BEAM-12573
>             Project: Beam
>          Issue Type: New Feature
>          Components: io-py-common
>            Reporter: Valentyn Tymofieiev
>            Priority: P2
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> As reported in [1], when trying to run the coders.py cookbook example [2], it raises an
> exception
> ```
>    PicklingError : _pickle.PicklingError: Can't pickle <class
> '__main__.JsonCoder'>: it's not the same object as __main__.JsonCoder
> [while running 'read/Read/Map(<lambda at iobase.py:899>)']
> ```
> To reproduce the issue, run:
> ```
>   python coders.py --input input.ndjson --output output.txt
> ```
> Where the input file (input.ndjson) has the same values as coders_test.py:
> ```
> {"host": ["Germany", 1], "guest": ["Italy", 0]}
> {"host": ["Germany", 1], "guest": ["Brasil", 3]}
> {"host": ["Brasil", 1], "guest": ["Italy", 0]}
> ```
> I have tracked the change in behavior to[3] with git bisect. This needs further investigation to understand the issue. 
> [1] https://lists.apache.org/thread.html/r45340bbee91a6caf798fe62d24388f645f8792cc7506351fd66adec3%40%3Cdev.beam.apache.org%3E
> [2] https://github.com/apache/beam/blob/35bac6a62f1dc548ee908cfeff7f73ffcac38e6f/sdks/python/apache_beam/examples/cookbook/coders.py
> [3]  https://github.com/apache/beam/pull/13154



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