GitHub user zsxwing opened a pull request:
https://github.com/apache/spark/pull/20461
[SPARK-23289][CORE]OneForOneBlockFetcher.DownloadCallback.onData should
write the bufer fully
## What changes were proposed in this pull request?
`channel.write(buf)` may not write the whole buffer since the underlying
channel is a FileChannel, we should retry until the whole buffer is written.
## How was this patch tested?
Jenkins
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zsxwing/spark SPARK-23289
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20461.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 #20461
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commit c186a6b489fd0233449692dd80d0cae6452905bb
Author: Shixiong Zhu <zsxwing@...>
Date: 2018-01-31T21:56:15Z
OneForOneBlockFetcher.DownloadCallback.onData write fully
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