Github user liyinan926 commented on the issue:
https://github.com/apache/spark/pull/22146
@mccheah @erikerlandson given that banch-2.4 has already been cut, we have
more flexibility in terms of timing of getting this in, as well as more space
for thoughts to get this right. I don't strongly oppose the idea of using a
config option to explicitly select the driver/executor container from possible
more than one containers in the pod. An alternative is to have a config option
for the index of the driver/executor container in the container list. This
approach is similar to using a json path, e.g., `.spec.containers[0]`. This to
me is easier for end-users as they don't need to spell the container name
twice.
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