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https://issues.apache.org/jira/browse/SPARK-34904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean R. Owen resolved SPARK-34904.
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Resolution: Not A Problem
> Old import of LZ4 package inside CompressionCodec.scala
> --------------------------------------------------------
>
> Key: SPARK-34904
> URL: https://issues.apache.org/jira/browse/SPARK-34904
> Project: Spark
> Issue Type: Question
> Components: Spark Core
> Affects Versions: 2.4.0, 3.1.1
> Reporter: Michal Zeman
> Priority: Minor
>
> This commit should upgrade the version of the LZ4 package:
> [https://github.com/apache/spark/commit/b78cf13bf05f0eadd7ae97df84b6e1505dc5ff9f]
>
> The dependency was changed. However, inside the file [CompressionCodec.scala
> |https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/io/CompressionCodec.scala]
> the old import referencing net.jpountz.lz4 (where versions up to 1.3. are
> held) remains.
> Because of probably backward compatibility, the newer version of org.lz4
> package still contains net.jpountz.lz4
> ([https://github.com/lz4/lz4-java/tree/master/src/java/net/jpountz/lz4)].
> Therefore this import does not cause problems at a first sight.
>
>
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