GitHub user stephenh opened a pull request:
https://github.com/apache/spark/pull/3725
[SPARK-4877] Allow user first classes to extend classes in the parent.
Previously, the classloader isolation was almost too good, such
that if a child class needed to load/reference a class that was
only available in the parent, it could not do so.
This adds tests for that case, the user-first Fake2 class extends
the only-in-parent Fake3 class.
It also sneaks in a fix where only the first stage seemed to work,
and on subsequent stages, a LinkageError happened because classes
from the user-first classpath were getting defined twice.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/stephenh/spark
4877_user_first_parent_inheritance
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/3725.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 #3725
----
commit 209d6d39438b3f0560a46220298a380db24210de
Author: Stephen Haberman <[email protected]>
Date: 2014-12-17T20:20:39Z
[SPARK-4877] Allow user first classes to extend classes in the parent.
Previously, the classloader isolation was almost too good, such
that if a child class needed to load/reference a class that was
only available in the parent, it could not do so.
This adds tests for that case, the user-first Fake2 class extends
the only-in-parent Fake3 class.
It also sneaks in a fix where only the first stage seemed to work,
and on subsequent stages, a LinkageError happened because classes
from the user-first classpath were getting defined twice.
----
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