[jira] [Resolved] (SPARK-4097) Race condition in org.apache.spark.ComplexFutureAction.cancel

["Reynold Xin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-4097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

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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