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https://issues.apache.org/jira/browse/SPARK-20904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-20904.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.3.0
                   2.2.1

Issue resolved by pull request 18594
[https://github.com/apache/spark/pull/18594]

> Task failures during shutdown cause problems with preempted executors
> ---------------------------------------------------------------------
>
>                 Key: SPARK-20904
>                 URL: https://issues.apache.org/jira/browse/SPARK-20904
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core, YARN
>    Affects Versions: 1.6.0
>            Reporter: Marcelo Vanzin
>             Fix For: 2.2.1, 2.3.0
>
>
> Spark runs tasks in a thread pool that uses daemon threads in each executor. 
> That means that when the JVM gets a signal to shut down, those tasks keep 
> running.
> Now when YARN preempts an executor, it sends a SIGTERM to the process, 
> triggering the JVM shutdown. That causes shutdown hooks to run which may 
> cause user code running in those tasks to fail, and report task failures to 
> the driver. Those failures are then counted towards the maximum number of 
> allowed failures, even though in this case we don't want that because the 
> executor was preempted.
> So we need a better way to handle that situation.



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