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https://issues.apache.org/jira/browse/SPARK-18960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15766274#comment-15766274
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Apache Spark commented on SPARK-18960:
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User 'uncleGen' has created a pull request for this issue:
https://github.com/apache/spark/pull/16370
> Avoid double reading file which is being copied.
> ------------------------------------------------
>
> Key: SPARK-18960
> URL: https://issues.apache.org/jira/browse/SPARK-18960
> Project: Spark
> Issue Type: Bug
> Components: SQL, Structured Streaming
> Affects Versions: 2.0.2
> Reporter: Genmao Yu
>
> In HDFS, when we copy a file into target directory, there will a temporary
> {{._COPY_}} file for a period of time. The duration depends on file size. If
> we do not skip this file, we will may read the same data for two times.
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