Github user felixcheung commented on the pull request:
https://github.com/apache/spark/pull/9218#issuecomment-152862908
```
Error :
/home/jenkins/workspace/SparkPullRequestBuilder/R/pkg/man/colnames.Rd: Sections
\title, and \name must exist and be unique in Rd files
ERROR: installing Rd objects failed for package 'SparkR'
```
This is odd, there shouldn't be a Rd file for colnames, I haven't changed
this and it worked before
```
#' @rdname columns
#' @name colnames
setMethod("colnames",
```
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