[GitHub] spark pull request #23216: [SPARK-26264][CORE]It is better to add @transient...

2018-12-04 Thread 10110346
Github user 10110346 closed the pull request at:

https://github.com/apache/spark/pull/23216


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[GitHub] spark pull request #23216: [SPARK-26264][CORE]It is better to add @transient...

2018-12-04 Thread HyukjinKwon
Github user HyukjinKwon commented on a diff in the pull request:

https://github.com/apache/spark/pull/23216#discussion_r238892679
  
--- Diff: core/src/main/scala/org/apache/spark/scheduler/ResultTask.scala 
---
@@ -56,7 +56,7 @@ private[spark] class ResultTask[T, U](
 stageAttemptId: Int,
 taskBinary: Broadcast[Array[Byte]],
 partition: Partition,
-locs: Seq[TaskLocation],
+@transient private var locs: Seq[TaskLocation],
--- End diff --

why is it `var` BTW?


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[GitHub] spark pull request #23216: [SPARK-26264][CORE]It is better to add @transient...

2018-12-04 Thread 10110346
GitHub user 10110346 opened a pull request:

https://github.com/apache/spark/pull/23216

[SPARK-26264][CORE]It is better to add @transient to field 'locs' for class 
`ResultTask`.

## What changes were proposed in this pull request?
The field 'locs' is only used in driver side  for class `ResultTask`, so it 
is not needed to serialize  when sending the `ResultTask`  to executor.
Although it's not very big, it's very frequent, so we can add` transient` 
for it  like `ShuffleMapTask`.


## How was this patch tested?
Existed unit tests


You can merge this pull request into a Git repository by running:

$ git pull https://github.com/10110346/spark locs_transient

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/spark/pull/23216.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 #23216


commit b3ede8be1a9073f057cc46fb82eacd7fa3ec36c6
Author: liuxian 
Date:   2018-12-04T08:55:40Z

fix




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