holdenk commented on a change in pull request #23954: [SPARK-27041][PySpark]
Use imap() for python 2.x to resolve oom issue
URL: https://github.com/apache/spark/pull/23954#discussion_r263981613
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File path: python/pyspark/worker.py
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@@ -45,6 +45,8 @@
if sys.version >= '3':
basestring = str
+else:
+ from itertools import imap as map # use iterator map by default
Review comment:
The way we pickle UDFs is a little weird, so I wouldn't be too surprised if
we did end up doing something silly by accident here, in that case we can also
invert the imports (e.g. import map as imap in py3)
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