GitHub user brkyvz opened a pull request:
https://github.com/apache/spark/pull/16881
[SPARK-19543] from_json fails when the input row is empty
## What changes were proposed in this pull request?
Using from_json on a column with an empty string results in:
java.util.NoSuchElementException: head of empty list.
This is because `parser.parse(input)` may return `Nil` when
`input.trim.isEmpty`
## How was this patch tested?
Regression test in `JsonExpressionsSuite`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/brkyvz/spark json-fix
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16881.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 #16881
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commit 49401b157f4d40bc2eeab036f96dc997ab31e3df
Author: Burak Yavuz <brk...@gmail.com>
Date: 2017-02-10T03:56:31Z
fix
commit 6ef0f45bde310f4b09ddbdc796246db03df0c080
Author: Burak Yavuz <brk...@gmail.com>
Date: 2017-02-10T04:08:26Z
ready for review
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