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Posted to common-issues@hadoop.apache.org by "Dmitry Chuyko (JIRA)" <ji...@apache.org> on 2017/11/13 11:07:00 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:
-----------------------------------
Description:
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.
was:
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 aeefective 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.
> 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
> Reporter: Dmitry Chuyko
>
> 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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