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https://issues.apache.org/jira/browse/ARROW-2284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16391130#comment-16391130
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ASF GitHub Bot commented on ARROW-2284:
---------------------------------------

pitrou opened a new pull request #1724: ARROW-2284: [Python] Fix error display 
on test_plasma error
URL: https://github.com/apache/arrow/pull/1724
 
 
   Just a trivial fix.  stderr is captured by py.test, not by the subprocess 
call.

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> [Python] test_plasma error on plasma_store error
> ------------------------------------------------
>
>                 Key: ARROW-2284
>                 URL: https://issues.apache.org/jira/browse/ARROW-2284
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>            Reporter: Antoine Pitrou
>            Assignee: Antoine Pitrou
>            Priority: Trivial
>              Labels: pull-request-available
>
> This appears caused by my latest changes:
> {code:python}
> Traceback (most recent call last):
>   File "/home/antoine/arrow/python/pyarrow/tests/test_plasma.py", line 192, 
> in setup_method
>     plasma_store_name, self.p = self.plasma_store_ctx.__enter__()
>   File "/home/antoine/miniconda3/envs/pyarrow/lib/python3.6/contextlib.py", 
> line 81, in __enter__
>     return next(self.gen)
>   File "/home/antoine/arrow/python/pyarrow/tests/test_plasma.py", line 168, 
> in start_plasma_store
>     err = proc.stderr.read().decode()
> AttributeError: 'NoneType' object has no attribute 'read'
> {code}



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