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https://issues.apache.org/jira/browse/SPARK-36669?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-36669:
------------------------------------
Assignee: Apache Spark
> Fail to load Lz4 codec
> ----------------------
>
> Key: SPARK-36669
> URL: https://issues.apache.org/jira/browse/SPARK-36669
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: L. C. Hsieh
> Assignee: Apache Spark
> Priority: Blocker
>
> Currently we use Hadop 3.3.1's shaded client libraries. Lz4 is a provided
> dependency in Hadoop Common 3.3.1 for Lz4Codec. But it isn't excluded from
> relocation in these libraries. So to use lz4 as Parquet codec, we will hit
> the exception even we include lz4 as dependency.
> {code:java}
> [info] Cause: java.lang.NoClassDefFoundError:
> org/apache/hadoop/shaded/net/jpountz/lz4/LZ4Factory
>
> [info] at
> org.apache.hadoop.io.compress.lz4.Lz4Compressor.<init>(Lz4Compressor.java:66)
> [info] at
> org.apache.hadoop.io.compress.Lz4Codec.createCompressor(Lz4Codec.java:119)
>
>
> [info] at
> org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:152)
>
>
> [info] at
> org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:168)
>
>
> {code}
>
> I already submitted a PR to Hadoop to fix it. Before it is released, at Spark
> side, we either downgrade to 3.3.0 or revert back to non-shaded hadoop client
> library.
>
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