Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/11340#discussion_r54191886
--- Diff: core/src/main/scala/org/apache/spark/TaskContextImpl.scala ---
@@ -55,14 +58,30 @@ private[spark] class TaskContextImpl(
this
}
- override def addTaskCompletionListener(f: TaskContext => Unit):
this.type = {
- onCompleteCallbacks += new TaskCompletionListener {
- override def onTaskCompletion(context: TaskContext): Unit =
f(context)
- }
+ override def addTaskFailureListener(listener: TaskFailureListener):
this.type = {
+ onFailureCallbacks += listener
this
}
- /** Marks the task as completed and triggers the listeners. */
+ /** Marks the task as completed and triggers the failure listeners. */
+ private[spark] def markTaskFailed(error: Throwable): Unit = {
+ val errorMsgs = new ArrayBuffer[String](2)
+ // Process complete callbacks in the reverse order of registration
+ onFailureCallbacks.reverse.foreach { listener =>
--- End diff --
Not sure how much it matters at all since it is an one time only operation
and usually the number of callbacks is in the range of 0 to 2. Prepending
efficiently would require us to not use the arraybuffer too.
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