[jira] [Commented] (ARROW-1980) [Python] Race condition in `write_to_dataset`

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-1980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16320759#comment-16320759 ] 

ASF GitHub Bot commented on ARROW-1980:
---------------------------------------

wesm commented on a change in pull request #1468: ARROW-1980: [Python] Fix race condition in write_to_dataset
URL: https://github.com/apache/arrow/pull/1468#discussion_r160757113
 
 

 ##########
 File path: python/pyarrow/parquet.py
 ##########
 @@ -966,6 +966,14 @@ def write_table(table, where, row_group_size=None, version='1.0',
 """.format(_parquet_writer_arg_docs)
 
 
+def _mkdir_if_not_exists(fs, path):
+    if fs._isfilestore() and not fs.exists(path):
+        try:
+            fs.mkdir(path)
+        except OSError:
+            assert fs.exists(path)
 
 Review comment:
   Maybe worth opening a JIRA about this in either case

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> [Python] Race condition in `write_to_dataset`
> ---------------------------------------------
>
>                 Key: ARROW-1980
>                 URL: https://issues.apache.org/jira/browse/ARROW-1980
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>            Reporter: Jim Crist
>              Labels: pull-request-available
>
> One race condition when creating directories was fixed in #1902, but a race condition still exists when using `partition_cols`.



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