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https://issues.apache.org/jira/browse/HADOOP-17891?focusedWorklogId=651322&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-651322
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ASF GitHub Bot logged work on HADOOP-17891:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 15/Sep/21 20:54
Start Date: 15/Sep/21 20:54
Worklog Time Spent: 10m
Work Description: viirya opened a new pull request #3441:
URL: https://github.com/apache/hadoop/pull/3441
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### Description of PR
### How was this patch tested?
### For code changes:
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(e.g. 'HADOOP-17799. Your PR title ...')?
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Issue Time Tracking
-------------------
Worklog Id: (was: 651322)
Time Spent: 14h 10m (was: 14h)
> lz4-java and snappy-java should be excluded from relocation in shaded Hadoop
> libraries
> --------------------------------------------------------------------------------------
>
> Key: HADOOP-17891
> URL: https://issues.apache.org/jira/browse/HADOOP-17891
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.3.1
> Reporter: L. C. Hsieh
> Assignee: L. C. Hsieh
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0, 3.3.2
>
> Attachments: HADOOP-17891-Addendum-01.patch
>
> Time Spent: 14h 10m
> Remaining Estimate: 0h
>
> lz4-java is a provided dependency. So in the shaded Hadoop libraries, e.g.
> hadoop-client-api, if we don't exclude lz4 dependency, the downstream will
> still see the exception even they include lz4 dependency.
> {code:java}
> [info] Cause: java.lang.ClassNotFoundException:
> org.apache.hadoop.shaded.net.jpountz.lz4.LZ4Factory
> [info] at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
> [info] at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
> [info] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
> [info] at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
> [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}
> Currently snappy-java is included and relocated in Hadoop shaded client
> libraries. But as it includes native methods, it should not be relocated too
> due to JNI method resolution. The downstream will see the exception:
> {code}
> [info] Cause: java.lang.UnsatisfiedLinkError:
> org.apache.hadoop.shaded.org.xerial.snappy.SnappyNative.rawCompress(Ljava/nio/ByteBuffer;IILjava/nio/ByteBuffer;I)I
> [info] at
> org.apache.hadoop.shaded.org.xerial.snappy.SnappyNative.rawCompress(Native
> Method)
>
> [info] at
> org.apache.hadoop.shaded.org.xerial.snappy.Snappy.compress(Snappy.java:151)
>
>
> [info] at
> org.apache.hadoop.io.compress.snappy.SnappyCompressor.compressDirectBuf(SnappyCompressor.java:282)
> [info] at
> org.apache.hadoop.io.compress.snappy.SnappyCompressor.compress(SnappyCompressor.java:210)
> {code}
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