GitHub user jinxing64 opened a pull request:
https://github.com/apache/spark/pull/17744
[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 https://github.com/jinxing64/spark SPARK-20426
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17744.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 #17744
----
commit 5fb91bfc5cdd588ae728a39173521279f517f20e
Author: jinxing <jinxing6...@126.com>
Date: 2017-04-24T12:52:00Z
[SPARK-20426] Lazy initialization of FileSegmentManagedBuffer for shuffle
service.
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