GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/2526
[SPARK-3681] [SQL] [PySpark] fix serialization of List and Map in SchemaRDD
Currently, the schema of object in ArrayType or MapType is attached lazily,
it will have better performance but introduce issues while serialization or
accessing nested objects.
This patch will apply schema to the objects of ArrayType or MapType
immediately when accessing them, will be a little bit slower, but much robust.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark nested
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/2526.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2526
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commit 2399ae5b38ca31ca2c42d9244964fb9d922d1f32
Author: Davies Liu <[email protected]>
Date: 2014-09-24T21:06:21Z
fix serialization of List and Map in SchemaRDD
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