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https://issues.apache.org/jira/browse/SPARK-20913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16028763#comment-16028763
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Takeshi Yamamuro commented on SPARK-20913:
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I think this is an expected behaviour. I feel you need to first ask this kind
of questions in the spark-user mailing list.
> Reference is ambiguous exception during dropDuplicates
> ------------------------------------------------------
>
> Key: SPARK-20913
> URL: https://issues.apache.org/jira/browse/SPARK-20913
> Project: Spark
> Issue Type: Bug
> Components: PySpark
> Affects Versions: 1.6.0
> Environment: Spark 1.6
> Reporter: Saurabh
> Labels: PySpark
> Original Estimate: 216h
> Remaining Estimate: 216h
>
> I'm getting an error when I try to do .dropDuplicates, its giving u"Reference
> 'xcol14x' is ambiguous exception.
> Changing the alias cannot be a solution as , if I have 40 column in each
> dataframe its merely impossible to change the name of each.
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