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Posted to common-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2016/05/25 19:31:13 UTC

[jira] [Commented] (HADOOP-11127) Improve versioning and compatibility support in native library for downstream hadoop-common users.

    [ https://issues.apache.org/jira/browse/HADOOP-11127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15300702#comment-15300702 ] 

Allen Wittenauer commented on HADOOP-11127:
-------------------------------------------

Ping.

It would be good to get this into 3.x.

> Improve versioning and compatibility support in native library for downstream hadoop-common users.
> --------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-11127
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11127
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: native
>            Reporter: Chris Nauroth
>            Assignee: Alan Burlison
>         Attachments: HADOOP-11064.003.patch, proposal.01.txt
>
>
> There is no compatibility policy enforced on the JNI function signatures implemented in the native library.  This library typically is deployed to all nodes in a cluster, built from a specific source code version.  However, downstream applications that want to run in that cluster might choose to bundle a hadoop-common jar at a different version.  Since there is no compatibility policy, this can cause link errors at runtime when the native function signatures expected by hadoop-common.jar do not exist in libhadoop.so/hadoop.dll.



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