GitHub user zsxwing opened a pull request:
https://github.com/apache/spark/pull/11313
Fix the issue that Iterator.map().toSeq is not Serializable
## What changes were proposed in this pull request?
`scala.collection.Iterator`'s methods (e.g., map, filter) will return an
`AbstractIterator` which is not Serializable. E.g.,
```Scala
scala> val iter = Array(1, 2, 3).iterator.map(_ + 1)
iter: Iterator[Int] = non-empty iterator
scala> println(iter.isInstanceOf[Serializable])
false
```
If we call something like `scala.collection.Iterator.map(...).toSeq`, it
will a `Stream` that contains a non-serializable `AbstractIterator` field and
make the `Stream` be non-serializable.
This PR uses `toArray` instead of `toSeq` to fix such issue in `def
createDataFrame(data: java.util.List[_], beanClass: Class[_]): DataFrame`.
## How was the this patch tested?
Jenkins tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zsxwing/spark SPARK-13390
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11313.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 #11313
----
commit 07a88b5f45028c5460fee0ea679095e589feea6e
Author: Shixiong Zhu <[email protected]>
Date: 2016-02-22T22:41:46Z
Fix the issue that Iterator.map().toSeq is not Serializable
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