[jira] [Resolved] (BEAM-6952) concatenated compressed files bug with python sdk

["Chamikara Jayalath (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-6952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chamikara Jayalath resolved BEAM-6952.
--------------------------------------
    Resolution: Fixed

> concatenated compressed files bug with python sdk
> -------------------------------------------------
>
>                 Key: BEAM-6952
>                 URL: https://issues.apache.org/jira/browse/BEAM-6952
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py-core
>    Affects Versions: 2.11.0
>            Reporter: Daniel Lescohier
>            Priority: Major
>             Fix For: 2.14.0
>
>          Time Spent: 3h 20m
>  Remaining Estimate: 0h
>
> The Python apache_beam.io.filesystem module has a bug handling concatenated compressed files.
> The PR I will create has two commits:
>  # a new unit test that shows the problem 
>  # a fix to the problem.
> The unit test is added to the apache_beam.io.filesystem_test module. It was added to this module because the test: apache_beam.io.textio_test.test_read_gzip_concat does not encounter the problem in the Beam 2.11 and earlier code base because the test data is too small: the data is smaller than read_size, so it goes through logic in the code that avoids the problem in the code. So, this test sets read_size smaller and test data bigger, in order to encounter the problem. It would be difficult to test in the textio_test module, because you'd need very large test data because default read_size is 16MiB, and the ReadFromText interface does not allow you to modify the read_size.



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