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From jinxing64 <>
Subject [GitHub] spark pull request #17744: [SPARK-20426] Lazy initialization of FileSegmentM...
Date Mon, 24 Apr 2017 12:53:50 GMT
GitHub user jinxing64 opened a pull request:

    [SPARK-20426] Lazy initialization of FileSegmentManagedBuffer for shuffle service.

    ## What changes were proposed in this pull request?
    When application contains large amount of shuffle blocks. NodeManager requires lots of
memory to keep metadata(`FileSegmentManagedBuffer`) in `StreamManager`. When the number of
shuffle blocks is big enough. NodeManager can run OOM. This pr proposes to do lazy initialization
of `FileSegmentManagedBuffer` in shuffle service.
    ## How was this patch tested?
    Manually test.

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

    $ git pull SPARK-20426

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

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #17744
commit 5fb91bfc5cdd588ae728a39173521279f517f20e
Author: jinxing <>
Date:   2017-04-24T12:52:00Z

    [SPARK-20426] Lazy initialization of FileSegmentManagedBuffer for shuffle service.


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