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https://issues.apache.org/jira/browse/BEAM-5626?focusedWorklogId=154083&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-154083
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ASF GitHub Bot logged work on BEAM-5626:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 13/Oct/18 04:28
            Start Date: 13/Oct/18 04:28
    Worklog Time Spent: 10m 
      Work Description: HuangLED commented on a change in pull request #6587: 
[BEAM-5626] Fix hadoop filesystem test for py3.
URL: https://github.com/apache/beam/pull/6587#discussion_r224949182
 
 

 ##########
 File path: sdks/python/apache_beam/io/hadoopfilesystem_test.py
 ##########
 @@ -214,6 +214,11 @@ def setUp(self):
       url = self.fs.join(self.tmpdir, filename)
       self.fs.create(url).close()
 
+    try:                    # Python 2
 
 Review comment:
   @tvalentyn    I came across this python2->python3 doc from python.org, LINK: 
 <a 
href='https://docs.python.org/3/howto/pyporting.html#learn-the-differences-between-python-2-3'>
 python-2-3 Difference </a> . 
   
   Interesting read. Section "Use feature detection instead of version 
detection" talks about replying on sys.version_info. Though the point does 
makes our use here into a negative.  
   
   just FYI.

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 154083)
    Time Spent: 5h 50m  (was: 5h 40m)

> Several IO tests fail in Python 3 with RuntimeError('dictionary changed size 
> during iteration',)}
> -------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-5626
>                 URL: https://issues.apache.org/jira/browse/BEAM-5626
>             Project: Beam
>          Issue Type: Sub-task
>          Components: sdk-py-core
>            Reporter: Valentyn Tymofieiev
>            Assignee: Ruoyun Huang
>            Priority: Major
>             Fix For: 2.8.0
>
>          Time Spent: 5h 50m
>  Remaining Estimate: 0h
>
>  ERROR: test_delete_dir 
> (apache_beam.io.hadoopfilesystem_test.HadoopFileSystemTest)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>   File 
> "/usr/local/google/home/valentyn/projects/beam/clean_head/beam/sdks/python/apache_beam/io/hadoopfilesystem_test.py",
>  line 506, in test_delete_dir
>      self.fs.delete([url_t1])
>    File 
> "/usr/local/google/home/valentyn/projects/beam/clean_head/beam/sdks/python/apache_beam/io/hadoopfilesystem.py",
>  line 370, in delete
>      raise BeamIOError("Delete operation failed", exceptions)
>  apache_beam.io.filesystem.BeamIOError: Delete operation failed with 
> exceptions {'hdfs://test_dir/new_dir1': RuntimeError('dictionary changed size 
> during iteration',       )}



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