Github user sun-rui commented on the pull request:
https://github.com/apache/spark/pull/10034#issuecomment-160617939
The example is correct. Jars is expected to a vector of character.
The bug is at
https://github.com/apache/spark/blob/master/R/pkg/R/client.R#L47.
The code can be change as follows:
```
jars <- paste(jars, collapse = ",")
if (jars != "") {
jars <- paste0("--jars ", jars)
}
```
It is more natural to use character vector in R. I don't think it necessary
to support both forms as it complicates the logic.
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