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https://issues.apache.org/jira/browse/HADOOP-15033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16322053#comment-16322053
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Hudson commented on HADOOP-15033:
---------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #13481 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/13481/])
HADOOP-15033. Use java.util.zip.CRC32C for Java 9 and above Contributed
(stevel: rev 2e0a451a8dd64ccd7199b2b435e1b6c704a9d3ae)
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/DataChecksum.java
* (edit)
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/Crc32PerformanceTest.java
* (edit) hadoop-project/pom.xml
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/Shell.java
* (edit)
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestShell.java
> Use java.util.zip.CRC32C for Java 9 and above
> ---------------------------------------------
>
> Key: HADOOP-15033
> URL: https://issues.apache.org/jira/browse/HADOOP-15033
> Project: Hadoop Common
> Issue Type: Improvement
> Components: performance, util
> Affects Versions: 3.0.0
> Reporter: Dmitry Chuyko
> Assignee: Dmitry Chuyko
> Labels: Java9, common, jdk9
> Fix For: 3.1.0
>
> Attachments: HADOOP-15033.001.patch, HADOOP-15033.001.patch,
> HADOOP-15033.002.patch, HADOOP-15033.003.patch, HADOOP-15033.003.patch,
> HADOOP-15033.004.patch, HADOOP-15033.005.diff, HADOOP-15033.005.diff,
> HADOOP-15033.005.diff, HADOOP-15033.005.patch, HADOOP-15033.006.patch,
> HADOOP-15033.007.patch, HADOOP-15033.007.patch, HADOOP-15033.008.patch,
> HADOOP-15033.009.patch, HADOOP-15033.009.patch, HADOOP-15033.009.patch,
> HADOOP-15033.009.patch, HADOOP-15033.009.patch, HADOOP-15033.009.patch,
> HADOOP-15033.009.patch, HADOOP-15033.010.patch
>
>
> java.util.zip.CRC32C implementation is available since Java 9.
> https://docs.oracle.com/javase/9/docs/api/java/util/zip/CRC32C.html
> Platform specific assembler intrinsics make it more effective than any pure
> Java implementation.
> Hadoop is compiled against Java 8 but class constructor may be accessible
> with method handle on 9 to instances implementing Checksum in runtime.
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