GitHub user zsxwing opened a pull request:
https://github.com/apache/spark/pull/18168
[SPARK-20940][Core]Replace IllegalAccessError with IllegalStateException
## What changes were proposed in this pull request?
`IllegalAccessError` is a fatal error (a subclass of LinkageError) and its
meaning is `Thrown if an application attempts to access or modify a field, or
to call a method that it does not have access to`. Throwing a fatal error for
AccumulatorV2 is not necessary and is pretty bad because it usually will just
kill executors or SparkContext
([SPARK-20666](https://issues.apache.org/jira/browse/SPARK-20666) is an example
of killing SparkContext due to `IllegalAccessError`). I think the correct type
of exception in AccumulatorV2 should be `IllegalStateException`.
## 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-20940
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18168.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 #18168
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commit 76601a7860413174c0e5eb97d7b0402d34013fc3
Author: Shixiong Zhu <[email protected]>
Date: 2017-05-31T21:14:09Z
Replace IllegalAccessError with IllegalStateException
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