Github user vijoshi commented on the issue:
https://github.com/apache/spark/pull/17731
@felixcheung yes. We need to support these two types of possibilities:
```
#do not call sparkR.session() - followed by implicit reference to
sparkSession
a <- createDataFrame(iris)
```
or
```
#do not call sparkR.session() - followed by implicit reference to
sparkContext
doubled <- spark.lapply(1:10, function(x){2 * x})
```
Internal implementations of APIs like `spark.lapply` directly look for the
sparkContext so to account for these, the sparkContext needs to be friendly to
being lazily initialized.
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