GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/2823
[SQL] Fixes the race condition that may cause test failure
The removed `Future` was used to end the test case as soon as the Spark SQL
CLI process exits. When the process exits prematurely, this mechanism prevents
the test case to wait until timeout. But it also creates a race condition: when
`foundAllExpectedAnswers.tryFailure` is called, there are chances that the last
expected output line of the CLI process hasn't been caught by the main logics
of the test code, thus fails the test case.
Removing this `Future` doesn't affect correctness.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark clean-clisuite
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/2823.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 #2823
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commit 489a97c3ab0fb034d4a9bff2ce3cb994756021e8
Author: Cheng Lian <[email protected]>
Date: 2014-10-16T09:00:39Z
Fixes the race condition that may cause test failure
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