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https://issues.apache.org/jira/browse/ARROW-1327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16116015#comment-16116015
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Wes McKinney commented on ARROW-1327:
-------------------------------------
PR: https://github.com/apache/arrow/pull/945
> [Python] Failing to release GIL in MemoryMappedFile._open causes deadlock
> -------------------------------------------------------------------------
>
> Key: ARROW-1327
> URL: https://issues.apache.org/jira/browse/ARROW-1327
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.5.0
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Fix For: 0.6.0
>
>
> This is occurring at
> https://github.com/apache/arrow/blob/master/python/pyarrow/io.pxi#L450
> This call is missing a {{with nogil:}}, the deadlock is occurring when this
> function attempts to reacquire the GIL to raise an exception. See discussion
> in ARROW-1282
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