Github user tgravescs commented on the pull request: https://github.com/apache/spark/pull/11512#issuecomment-195370827 Yes its only if they explicitly System.exit. Or someone puts a System.exit back into Spark but that shouldn't happen except on failure. ok @jerryshao can you update pr for master to just be to change default behavior of shutdown hook assume failures. Then a PR to 1.6 with this signal handler
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