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Posted to issues@spark.apache.org by "胡振宇 (Jira)" <ji...@apache.org> on 2021/08/26 02:32:00 UTC
[jira] [Commented] (SPARK-36584) ExecutorMonitor#onBlockUpdated
will receive event from driver
[ https://issues.apache.org/jira/browse/SPARK-36584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17404844#comment-17404844 ]
胡振宇 commented on SPARK-36584:
-----------------------------
any one can verify this question [~holden.karau@gmail.com] [~holdenkarau] ?
> ExecutorMonitor#onBlockUpdated will receive event from driver
> -------------------------------------------------------------
>
> Key: SPARK-36584
> URL: https://issues.apache.org/jira/browse/SPARK-36584
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.1.2
> Environment: Spark 3.1.2
> Reporter: 胡振宇
> Priority: Major
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> When driver broadcast object,
> it will send the [SparkListenerBlockUpdated](https://github.com/apache/spark/blob/df0ec56723f0b47c3629055fa7a8c63bb4285147/core/src/main/scala/org/apache/spark/scheduler/SparkListener.scala#L228) event.
> [ExecutorMonitor#onBlockUpdated](https://github.com/apache/spark/blob/df0ec56723f0b47c3629055fa7a8c63bb4285147/core/src/main/scala/org/apache/spark/scheduler/dynalloc/ExecutorMonitor.scala#L380)
> receives and handles the event, in this method,
> it calls [ensureExecutorIsTracked](https://github.com/apache/spark/blob/df0ec56723f0b47c3629055fa7a8c63bb4285147/core/src/main/scala/org/apache/spark/scheduler/dynalloc/ExecutorMonitor.scala#L489)
> to put driver in `executors` variable, but in my understanding, `ExecutorMonitor` should only monitor Executor, not Driver.
> Moreover, adding a `driver` to the `executors` will affect the calculation of
> [ExecutorAllocationManager#removeExecutors](https://github.com/apache/spark/blob/df0ec56723f0b47c3629055fa7a8c63bb4285147/core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala#L552), and the driver will occupy the count of `executors`
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