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https://issues.apache.org/jira/browse/SPARK-20547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shixiong Zhu resolved SPARK-20547.
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Resolution: Fixed
Fix Version/s: 3.0.0
> ExecutorClassLoader's findClass may not work correctly when a task is
> cancelled.
> --------------------------------------------------------------------------------
>
> Key: SPARK-20547
> URL: https://issues.apache.org/jira/browse/SPARK-20547
> Project: Spark
> Issue Type: Bug
> Components: Spark Shell
> Affects Versions: 2.1.0, 2.2.0
> Reporter: Shixiong Zhu
> Assignee: Shixiong Zhu
> Priority: Minor
> Fix For: 3.0.0
>
>
> ExecutorClassLoader's findClass may throw some transient exception. For
> example, when a task is cancelled, if ExecutorClassLoader is running, you may
> see InterruptedException or IOException, even if this class can be loaded.
> Then the result of findClass will be cached by JVM, and later when the same
> class is being loaded (note: in this case, this class may be still loadable),
> it will just throw NoClassDefFoundError.
> We should make ExecutorClassLoader retry on transient exceptions.
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