GitHub user zentol opened a pull request:
https://github.com/apache/flink/pull/3896
[FLINK-6370] [webUI] Handle races for single file in FileServerHandler
This PR prevents a race between multiple requests trying to create the same
file, which previously would cause one request to fail.
We can't just ignore the `FileAlreadyExistsException` since there's no
guarantee that the file copying is complete. To prevent this scenario the
copying is now done in a `synchronized` block, along with ignoring the
`FileAlreadyExistsExceptions`.
Due to the small size of files loaded from the class-loader this should
have no impact on the responsiveness of the webUI.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zentol/flink 6370_web_file
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3896.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 #3896
----
commit 4ebee58fa8c39d0aa6d68d1470ea3a850e92b954
Author: zentol <[email protected]>
Date: 2017-05-14T19:57:16Z
[FLINK-6370] [webUI] Handle races for single file in FileServerHandler
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