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From "Alan Burlison (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11127) Improve versioning and compatibility support in native library for downstream hadoop-common users.
Date Fri, 09 Oct 2015 14:00:33 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14950427#comment-14950427
] 

Alan Burlison commented on HADOOP-11127:
----------------------------------------

Sorry, I'm not clear what I'm currently being asked to do. Is it the change outlined in the
attached proposal or the build/distro restructure? This bug is currently a blocker for the
Solaris DomainSocket timeout work, which is in turn implicated in a large number of Solaris
test bugs. Until we can establish what the way forward is, even if that's only an interim
solution, I'm pretty much dead in the water.

> 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: Bug
>          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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