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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