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[GitHub] [spark] Ngone51 opened a new pull request #35069: [SPARK-35714][FOLLOW-UP][CORE] WorkerWatcher should run System.exit in a thread out of RpcEnv
Ngone51 opened a new pull request #35069:
URL: https://github.com/apache/spark/pull/35069
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### What changes were proposed in this pull request?
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This PR proposes to let `WorkerWatcher` run `System.exit` in a separate thread instead of some thread of `RpcEnv`.
### Why are the changes needed?
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`System.exit` will trigger the shutdown hook to run `executor.stop`, which will result in the same deadlock issue with SPARK-14180. But note that since Spark upgrades to Hadoop 3 recently, each hook now will have a [timeout threshold](https://github.com/apache/hadoop/blob/d4794dd3b2ba365a9d95ad6aafcf43a1ea40f777/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ShutdownHookManager.java#L205-L209) which forcibly interrupt the hook execution once reaches timeout. So, the deadlock issue doesn't really exist in the master branch. However, it's still critical for previous releases and is a wrong behavior that should be fixed.
### Does this PR introduce _any_ user-facing change?
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No.
### How was this patch tested?
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Tested manually.
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[GitHub] [spark] Ngone51 commented on pull request #35069: [SPARK-35714][FOLLOW-UP][CORE] WorkerWatcher should run System.exit in a thread out of RpcEnv
Posted by GitBox <gi...@apache.org>.
Ngone51 commented on pull request #35069:
URL: https://github.com/apache/spark/pull/35069#issuecomment-1004474531
cc @mridulm @cloud-fan @jiangxb1987
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[GitHub] [spark] mridulm commented on pull request #35069: [SPARK-35714][FOLLOW-UP][CORE] WorkerWatcher should run System.exit in a thread out of RpcEnv
Posted by GitBox <gi...@apache.org>.
mridulm commented on pull request #35069:
URL: https://github.com/apache/spark/pull/35069#issuecomment-1005342309
Late +1
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[GitHub] [spark] Ngone51 commented on pull request #35069: [SPARK-35714][FOLLOW-UP][CORE] WorkerWatcher should run System.exit in a thread out of RpcEnv
Posted by GitBox <gi...@apache.org>.
Ngone51 commented on pull request #35069:
URL: https://github.com/apache/spark/pull/35069#issuecomment-1005336867
Thanks all! Merged to Master/branch-3.2/branch-3.1/branch-3.0.
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[GitHub] [spark] andrewli81 commented on pull request #35069: [SPARK-35714][FOLLOW-UP][CORE] WorkerWatcher should run System.exit in a thread out of RpcEnv
Posted by GitBox <gi...@apache.org>.
andrewli81 commented on pull request #35069:
URL: https://github.com/apache/spark/pull/35069#issuecomment-1005094575
Thanks for proactively fixing this!
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[GitHub] [spark] Ngone51 closed pull request #35069: [SPARK-35714][FOLLOW-UP][CORE] WorkerWatcher should run System.exit in a thread out of RpcEnv
Posted by GitBox <gi...@apache.org>.
Ngone51 closed pull request #35069:
URL: https://github.com/apache/spark/pull/35069
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