Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/17480#discussion_r111521465
--- Diff:
core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala ---
@@ -249,7 +249,14 @@ private[spark] class ExecutorAllocationManager(
* yarn-client mode when AM re-registers after a failure.
*/
def reset(): Unit = synchronized {
- initializing = true
+ /**
+ * When some tasks need to be scheduled and initial executor = 0,
resetting the initializing
+ * field may cause it to not be set to false in yarn.
+ * SPARK-20079: https://issues.apache.org/jira/browse/SPARK-20079
+ */
+ if (maxNumExecutorsNeeded() == 0) {
+ initializing = true
--- End diff --
Well, I understood your thinking.
This actually comes from the definition of reset, should it be the initial
state or the last state before failure. In our previous commit we chose the
former to roll back to the initial state. But here you suggest the latter is
better. I agree with the latter looks more reasonable, also could address the
problem here. Thanks for the clarification.
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