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https://issues.apache.org/jira/browse/SPARK-4097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-4097.
--------------------------------
Resolution: Fixed
Fix Version/s: 1.2.0
1.1.1
Assignee: Shixiong Zhu
> Race condition in org.apache.spark.ComplexFutureAction.cancel
> -------------------------------------------------------------
>
> Key: SPARK-4097
> URL: https://issues.apache.org/jira/browse/SPARK-4097
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.1.0
> Reporter: Shixiong Zhu
> Assignee: Shixiong Zhu
> Priority: Minor
> Labels: bug, race-condition
> Fix For: 1.1.1, 1.2.0
>
>
> There is a chance that `thread` is null when calling `thread.interrupt()`.
> {code:java}
> override def cancel(): Unit = this.synchronized {
> _cancelled = true
> if (thread != null) {
> thread.interrupt()
> }
> }
> {code}
> Should put `thread = null` into a `synchronized` block to fix the race
> condition.
> {code:java}
> try {
> p.success(func)
> } catch {
> case e: Exception => p.failure(e)
> } finally {
> thread = null
> }
> {code}
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