GitHub user witgo opened a pull request:
https://github.com/apache/spark/pull/11986
DAGScheduler should get map output statuses directly.
## What changes were proposed in this pull request?
Add a new method to `MapOutputTracker` class
```scala
def getMapOutputStatuses(shuffleId: Int): Array[MapStatus] =
epochLock.synchronized {
mapStatuses.getOrElse(shuffleId, Array[MapStatus]())
}
```
DAG uses `getMapOutputStatuses` rather than the
`getSerializedMapOutputStatuses`
## How was this patch tested?
Tests run successfully.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/witgo/spark SPARK-14178
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11986.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 #11986
----
commit ebb284bf239684acc9e8e06e831dbbdd49e6bb94
Author: GuoQiang Li <[email protected]>
Date: 2016-03-27T07:30:44Z
DAGScheduler should get map output statuses directly, not by
MapOutputTrackerMaster.getSerializedMapOutputStatuses.
----
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