Github user sun-rui commented on the pull request:
https://github.com/apache/spark/pull/8832#issuecomment-141860945
@falaki , are you using RStudio, where spark-submit is not involved?
I don't think we can simply set a default value. Because it is possible
that the default mode does not match spark master. For example, if the spark
master is 'yarn-cluster', the default mode is "client", that does not match.
The correct policy is:
if the master does not contain deploy mode information, the deploy mode
is "client",
else get deploy mode from the master URL.
I think this issue is not related to SparkR only. @andrewor14, any policy
when handling default configurations when a spark-application is not launched
via spark-submit? Should we extract some logic from spark-submit so that the
logic can be called in non-spark-submit cases to keep consistency?
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