Github user susanxhuynh commented on the issue: https://github.com/apache/spark/pull/20640 @skonto We should not remove the logging. The logging [here](https://github.com/apache/spark/blob/f41c0a93fd3913ad93e55ddbfd875229872ecc97/core/src/main/scala/org/apache/spark/scheduler/BlacklistTracker.scala#L194) is only available if blacklisting is enabled, but by default blacklisting is disabled. The BlacklistTracker object [is not created](https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala#L748) if blacklisting is disabled. But, we might still want to see the log of executor failure in this case. In the case where an executor fails before entering Spark code (for example, Mesos agent failed to create the sandbox), would it be detected?
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