Github user hankim commented on the issue:

    https://github.com/apache/spark/pull/20360
  
    is there any workaround for this? my environment hasn't upgrade to 2.3.0, 
but I have exact code that jira ticket has. 
(http://mail-archives.apache.org/mod_mbox/spark-issues/201801.mbox/%3cjira.13132665.1516622460000.6681.1516622520...@atlassian.jira%3E)
 
    i.e., assigning uuid after distinct() call with udf.
    Thank you!
    cc @viirya @HyukjinKwon @cloud-fan


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