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Posted to reviews@spark.apache.org by JoshRosen <gi...@git.apache.org> on 2015/09/18 21:01:22 UTC

[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

GitHub user JoshRosen opened a pull request:

    https://github.com/apache/spark/pull/8825

    [SPARK-10704] Consolidate HashShuffleReader and ShuffleReader; refactor ShuffleManager.getReader()

    The current shuffle code has an interface named ShuffleReader with only one implementation, HashShuffleReader. This naming is confusing, since the same read path code is used for both sort- and hash-based shuffle. This patch consolidates these into a single class named ShuffleReader.
    
    In addition, there are aspects of ShuffleManager.getReader()'s API which don't make a lot of sense: it exposes the ability to request a contiguous range of shuffle partitions, but this feature isn't supported by any ShuffleReader implementations and isn't used anywhere in the existing code. If we do want to implement support for fetching multiple partitions then we'll likely want to support the ability to fetch sets of partitions with non-contiguous ids, which this interface doesn't support. As a result, this patch also changes this API to accept a single partition id.

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

    $ git pull https://github.com/JoshRosen/spark shuffle-reader-cleanup

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

    https://github.com/apache/spark/pull/8825.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 #8825
    
----
commit ad532e49b0093c8f6529ede09d794c975fb1ce69
Author: Josh Rosen <jo...@databricks.com>
Date:   2015-09-18T17:44:50Z

    Rename HashShuffleReader to ShuffleReader.

commit 90e01c09ea79c7c9c0006878434a32c3d568bc6b
Author: Josh Rosen <jo...@databricks.com>
Date:   2015-09-18T18:09:30Z

    Change getReader() to only accept a single partition:
    
    There was no ShuffleReader implementation that supported the ability to fetch
    a range of partitions. If we do want to implement support for fetching multiple
    partitions then we'll likely want to support the ability to fetch sets of
    partitions with non-contiguous ids, which this interface doesn't support.

commit a0e7fc6aad69fe22602700d9f6f74716b15d7d86
Author: Josh Rosen <jo...@databricks.com>
Date:   2015-09-18T18:48:07Z

    Consolidate getReader() implementations.

----


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-142115916
  
      [Test build #42776 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42776/consoleFull) for   PR 8825 at commit [`cf0c4c2`](https://github.com/apache/spark/commit/cf0c4c28819b90ad1ee18d3a9f77dc6fd2739d21).


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by rxin <gi...@git.apache.org>.
Github user rxin commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141632344
  
    It might make sense to not remove the start/end partitions. I think @mateiz and @yhuai was thinking about using that for adaptive query processing.



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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by JoshRosen <gi...@git.apache.org>.
Github user JoshRosen commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-142111382
  
    Good points. I'm going to re-scope this change to only perform the renaming.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141592079
  
     Merged build triggered.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-142114590
  
    Merged build started.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by mateiz <gi...@git.apache.org>.
Github user mateiz commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141688039
  
    I already have a patch for the range of partitions, so please leave that in. https://github.com/mateiz/spark/tree/spark-9852


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141567384
  
    Merged build started.


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[GitHub] spark pull request: [SPARK-10704] Rename HashShuffleReader to Bloc...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-142144115
  
    Merged build finished. Test PASSed.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141555627
  
    Merged build started.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141543857
  
      [Test build #42680 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42680/console) for   PR 8825 at commit [`a0e7fc6`](https://github.com/apache/spark/commit/a0e7fc6aad69fe22602700d9f6f74716b15d7d86).
     * This patch **fails MiMa tests**.
     * This patch merges cleanly.
     * This patch adds no public classes.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by mateiz <gi...@git.apache.org>.
Github user mateiz commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141688454
  
    By the way, the reason it took contiguous partition IDs was to make them cheap to read from disk in one read. So I'd like to try keeping it like that before we decide that we really need arbitrary sets of partitions.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by JoshRosen <gi...@git.apache.org>.
Github user JoshRosen commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141591455
  
    Jenkins, retest this please.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141537831
  
      [Test build #42680 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42680/consoleFull) for   PR 8825 at commit [`a0e7fc6`](https://github.com/apache/spark/commit/a0e7fc6aad69fe22602700d9f6f74716b15d7d86).


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141592101
  
    Merged build started.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by mateiz <gi...@git.apache.org>.
Github user mateiz commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141693510
  
    BTW another thing you should consider is just renaming HashShuffleReader to BlockStoreShuffleReader and still leaving in the abstract interface. The interface was there in case we want to do things like push-based shuffle in the future, and I don't think it's a hard interface to understand. But the name Hash is indeed confusing. 


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141567365
  
     Merged build triggered.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141588101
  
      [Test build #42682 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42682/console) for   PR 8825 at commit [`36b25e3`](https://github.com/apache/spark/commit/36b25e347f0573d96a5940ead837e02a10e5ae08).
     * This patch **passes all tests**.
     * This patch merges cleanly.
     * This patch adds no public classes.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141591264
  
    Merged build finished. Test FAILed.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141556084
  
      [Test build #42682 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42682/consoleFull) for   PR 8825 at commit [`36b25e3`](https://github.com/apache/spark/commit/36b25e347f0573d96a5940ead837e02a10e5ae08).


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[GitHub] spark pull request: [SPARK-10704] Rename HashShuffleReader to Bloc...

Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:

    https://github.com/apache/spark/pull/8825


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141591194
  
      [Test build #42691 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42691/console) for   PR 8825 at commit [`43eb0cf`](https://github.com/apache/spark/commit/43eb0cf2e1ee242724c6f329b8e0ce64b419b806).
     * This patch **fails Spark unit tests**.
     * This patch merges cleanly.
     * This patch adds no public classes.


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[GitHub] spark pull request: [SPARK-10704] Rename HashShuffleReader to Bloc...

Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-142144020
  
      [Test build #42776 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42776/console) for   PR 8825 at commit [`cf0c4c2`](https://github.com/apache/spark/commit/cf0c4c28819b90ad1ee18d3a9f77dc6fd2739d21).
     * This patch **passes all tests**.
     * This patch merges cleanly.
     * This patch adds no public classes.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141588199
  
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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
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    https://github.com/apache/spark/pull/8825#issuecomment-141543896
  
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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-142114562
  
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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
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    https://github.com/apache/spark/pull/8825#issuecomment-141555612
  
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[GitHub] spark pull request: [SPARK-10704] Rename HashShuffleReader to Bloc...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-142144117
  
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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
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    https://github.com/apache/spark/pull/8825#issuecomment-141543900
  
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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by JoshRosen <gi...@git.apache.org>.
Github user JoshRosen commented on a diff in the pull request:

    https://github.com/apache/spark/pull/8825#discussion_r39900619
  
    --- Diff: project/MimaExcludes.scala ---
    @@ -70,6 +70,13 @@ object MimaExcludes {
               "org.apache.spark.scheduler.AskPermissionToCommitOutput.this"),
             ProblemFilters.exclude[IncompatibleMethTypeProblem](
               "org.apache.spark.scheduler.AskPermissionToCommitOutput.apply")
    +      ) ++ Seq(
    +        // SPARK-10704: Switched ShuffleManager from a trait to an abstract class.
    --- End diff --
    
    This will break client code which called these APIs directly, but these were clearly labeled as `private[spark]` and shouldn't have been used in this way.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141567998
  
      [Test build #42691 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42691/consoleFull) for   PR 8825 at commit [`43eb0cf`](https://github.com/apache/spark/commit/43eb0cf2e1ee242724c6f329b8e0ce64b419b806).


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141591265
  
    Test FAILed.
    Refer to this link for build results (access rights to CI server needed): 
    https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42691/
    Test FAILed.


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[GitHub] spark pull request: [SPARK-10704] Rename HashShuffleReader to Bloc...

Posted by rxin <gi...@git.apache.org>.
Github user rxin commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-142383435
  
    LGTM. merging in master.



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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141536602
  
    Merged build started.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141536569
  
     Merged build triggered.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141588197
  
    Merged build finished. Test PASSed.


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141592972
  
      [Test build #42701 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/42701/consoleFull) for   PR 8825 at commit [`43eb0cf`](https://github.com/apache/spark/commit/43eb0cf2e1ee242724c6f329b8e0ce64b419b806).


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[GitHub] spark pull request: [SPARK-10704] Consolidate HashShuffleReader an...

Posted by rxin <gi...@git.apache.org>.
Github user rxin commented on the pull request:

    https://github.com/apache/spark/pull/8825#issuecomment-141633056
  
    Actually LGTM - since we can add this later, and existing implementation doesn't support it anyway.



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