GitHub user zsxwing opened a pull request:
https://github.com/apache/spark/pull/16273
[SPARK-18852][SS]StreamingQuery.lastProgress should be null when
recentProgress is empty
## What changes were proposed in this pull request?
Right now `StreamingQuery.lastProgress` throws NoSuchElementException and
it's hard to be used in Python since Python user will just see Py4jError.
This PR just makes it return null instead.
## How was this patch tested?
`test("lastProgress should be null when recentProgress is empty")`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zsxwing/spark SPARK-18852
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16273.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 #16273
----
commit 326d16fad5637c97133852c672a5e3c6af742b56
Author: Shixiong Zhu <[email protected]>
Date: 2016-12-13T22:35:36Z
StreamingQuery.lastProgress should be null when recentProgress is empty
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