[jira] [Commented] (HADOOP-14066) VersionInfo should be public api

["Steve Loughran (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-14066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15859574#comment-15859574 ] 

Steve Loughran commented on HADOOP-14066:
-----------------------------------------

I'm happy with this, though I do know that Hive does overreact to version 3 JARs; we've had to add the ability to lie about versions to shut it up {{-Ddeclared.hadoop.version=2.11}}

> VersionInfo should be public api
> --------------------------------
>
>                 Key: HADOOP-14066
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14066
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: common
>            Reporter: Thejas M Nair
>            Priority: Critical
>
> org.apache.hadoop.util.VersionInfo is commonly used by applications that work with multiple versions of Hadoop.
> In case of Hive, this is used in a shims layer to identify the version of hadoop and use different shim code based on version (and the corresponding api it supports).
> I checked Pig and Hbase as well and they also use this class to get version information.
> However, this method is annotated as "@private" and "@unstable".
> This code has actually been stable for long time and is widely used like a public api. I think we should mark it as such.
> Note that there are apis to find the version of server components in hadoop, however, this class necessary for finding the version of client.



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