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https://issues.apache.org/jira/browse/HADOOP-18737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17721382#comment-17721382
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Steve Loughran commented on HADOOP-18737:
-----------------------------------------

this is too old. we're only doing critical CVE patches here, and adding apis 
simply encourages people to stay on obsolete versions which don't work on 
java11+, or, in the case of <=2.8, java 8. 

if someone on hadoop 2 wants to use the new API, then they get to use 
reflection. Now, in https://github.com/steveloughran/fs-api-shim  I am trying 
to do a shim library for hadoop 3.2.0+ to use APIs which came later (msync, 
openFile(), vector IO, ByteBufferPositionedReadable), but I'm not going near 
2.x as its too old.

> Backport HADOOP-18671 to branch-2.10.x
> --------------------------------------
>
>                 Key: HADOOP-18737
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18737
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Tak-Lon (Stephen) Wu
>            Priority: Major
>




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