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Posted to common-issues@hadoop.apache.org by "Dmitry Chuyko (JIRA)" <ji...@apache.org> on 2018/01/06 12:14:00 UTC
[jira] [Updated] (HADOOP-15033) Use java.util.zip.CRC32C for Java 9
and above
[ https://issues.apache.org/jira/browse/HADOOP-15033?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dmitry Chuyko updated HADOOP-15033:
-----------------------------------
Attachment: HADOOP-15033.009.patch
> 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
> Labels: Java9, common, jdk9
> 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
>
>
> 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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