Davies Liu created SPARK-5223:
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Summary: Use pickle instead of MapConvert and ListConvert in MLlib
Python API
Key: SPARK-5223
URL: https://issues.apache.org/jira/browse/SPARK-5223
Project: Spark
Issue Type: Bug
Components: MLlib, PySpark
Reporter: Davies Liu
Priority: Critical
It will introduce problems if the object in dict/list/tuple can not support by
py4j, such as Vector.
Also, pickle may have better performance for larger object (less RPC).
In some cases that the object in dict/list can not be pickled (such as
JavaObject), we should still use MapConvert/ListConvert.
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