Github user aarondav commented on the pull request:
https://github.com/apache/spark/pull/5004#issuecomment-80663465
Is it really OK to System.exit() the driver JVM? This may be user code that
has an embedded SparkContext. The SparkUncaughtExceptionHandler is suitable for
Executors, where we have full control over the JVM, and AppClient for the same
reason, but I'm not sure TaskSchedulerImpl should be using it, or
ContextCleaner, for instance.
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