GitHub user kiszk opened a pull request:
https://github.com/apache/spark/pull/17811
[SPARK-20537][Core] Fixing OffHeapColumnVector reallocation
## What changes were proposed in this pull request?
As #17773 revealed `OnHeapColumnVector` may copy a part of the original
storage.
`OffHeapColumnVector` reallocation also copies to the new storage data up
to 'elementsAppended'. This variable is only updated when using the
`ColumnVector.appendX` API, while `ColumnVector.putX` is more commonly used.
This PR copies the new storage data up to the previously-allocated size
in`OffHeapColumnVector`.
## How was this patch tested?
Existing test suites
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kiszk/spark SPARK-20537
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17811.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 #17811
----
commit ccd872fa2c74ac6828e75c623555b41b33240420
Author: Kazuaki Ishizaki <[email protected]>
Date: 2017-04-30T10:28:10Z
initial commit
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