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https://issues.apache.org/jira/browse/SPARK-4249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14200188#comment-14200188
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Apache Spark commented on SPARK-4249:
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User 'lianhuiwang' has created a pull request for this issue:
https://github.com/apache/spark/pull/3138
> A problem of EdgePartitionBuilder in Graphx
> -------------------------------------------
>
> Key: SPARK-4249
> URL: https://issues.apache.org/jira/browse/SPARK-4249
> Project: Spark
> Issue Type: Bug
> Components: GraphX
> Affects Versions: 1.1.0
> Reporter: Cookies
> Priority: Minor
>
> https://github.com/apache/spark/blob/master/graphx/src/main/scala/org/apache/spark/graphx/impl/EdgePartitionBuilder.scala#L48
> in function toEdgePartition, code snippet " index.update(srcIds(0), 0)"
> the elements in array srcIds are all not initialized and are all 0. The
> effect is that if vertex ids don't contain 0, indexSize is equal to
> (realIndexSize + 1) and 0 is added to the `index`
> It seems that all versions have the problem
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