GitHub user jodersky opened a pull request:
https://github.com/apache/spark/pull/12745
[SPARK-10001][Core][Hotfix] Don't short-circuit actions in signal handlers
## What changes were proposed in this pull request?
The current signal handlers have a subtle bug that stops evaluating
registered actions as soon as one of them returns true, this is because
`forall` is short-circuited.
This PR adds a strict mapping stage before evaluating returned result.
There are no known occurrences of the bug and this is a preemptive fix.
## How was this patch tested?
As with the original introduction of signal handlers, this was tested
manually (unit testing with signals is not straightforward).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/jodersky/spark SPARK-10001-hotfix
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12745.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 #12745
----
commit 7fe0e54c5e39ff942fd58a16d5e5e309887ee883
Author: Jakob Odersky <[email protected]>
Date: 2016-04-27T22:26:41Z
Evaluate all actions in signal handlers (don't short-circuit)
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