GitHub user squito opened a pull request:
https://github.com/apache/spark/pull/21474
[SPARK-24297][CORE] Fetch-to-disk by default for > 2gb
Fetch-to-mem is guaranteed to fail if the message is bigger than 2 GB,
so we might as well use fetch-to-disk in that case. The message includes
some metadata in addition to the block data itself (in particular
UploadBlock has a lot of metadata), so we leave a little room.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/squito/spark SPARK-24297
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21474.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 #21474
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commit 6b7c4f716e13cc4dcde756e98478edffb9e0d0f5
Author: Imran Rashid <irashid@...>
Date: 2018-05-31T21:35:01Z
[SPARK-24297][CORE] Fetch-to-disk by default for > 2gb
Fetch-to-mem is guaranteed to fail if the message is bigger than 2 GB,
so we might as well use fetch-to-disk in that case. The message includes
some metadata in addition to the block data itself (in particular
UploadBlock has a lot of metadata), so we leave a little room.
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