GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/11826
[SPARK-14007] [SQL] Cleanup hash2
## What changes were proposed in this pull request?
This PR try acquire the memory for hash map in shuffled hash join, fail the
task if there is no enough memory (otherwise it could OOM the executor).
It also removed unused HashedRelation.
## How was this patch tested?
Existing unit tests. Manual tests with TPCDS Q78.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark cleanup_hash2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11826.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 #11826
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commit d84e581a74591211a0ebb1e25cf35d12bf59f23c
Author: Davies Liu <dav...@databricks.com>
Date: 2016-03-18T07:24:11Z
acquire memory for hash map
commit 312e4ff27db4c4650633821dae538f5a6b412ea9
Author: Davies Liu <dav...@databricks.com>
Date: 2016-03-18T17:50:50Z
tiny fix
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