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https://issues.apache.org/jira/browse/SPARK-4294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14201728#comment-14201728
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Apache Spark commented on SPARK-4294:
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User 'watermen' has created a pull request for this issue:
https://github.com/apache/spark/pull/3151
> The same function should have the same realization.
> ---------------------------------------------------
>
> Key: SPARK-4294
> URL: https://issues.apache.org/jira/browse/SPARK-4294
> Project: Spark
> Issue Type: Improvement
> Components: Streaming
> Affects Versions: 1.1.0
> Reporter: Yadong Qi
> Priority: Minor
> Fix For: 1.2.0
>
>
> In class TransformedDStream:
> require(parents.length > 0, "List of DStreams to transform is empty")
> require(parents.map(_.ssc).distinct.size == 1, "Some of the DStreams have
> different contexts")
> require(parents.map(_.slideDuration).distinct.size == 1,
> "Some of the DStreams have different slide durations")
> In class UnionDStream:
> if (parents.length == 0) {
> throw new IllegalArgumentException("Empty array of parents")
> }
> if (parents.map(_.ssc).distinct.size > 1) {
> throw new IllegalArgumentException("Array of parents have different
> StreamingContexts")
> }
> if (parents.map(_.slideDuration).distinct.size > 1) {
> throw new IllegalArgumentException("Array of parents have different slide
> times")
> }
> The function is the same, but the realization is not. I think they shoule be
> the same.
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