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Posted to common-issues@hadoop.apache.org by "Chris Nauroth (JIRA)" <ji...@apache.org> on 2014/09/26 17:51:34 UTC
[jira] [Updated] (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:all-tabpanel ]
Chris Nauroth updated HADOOP-11127:
-----------------------------------
Attachment: HADOOP-11064.003.patch
To keep the discussion fully documented in this issue, I'm re-uploading the patch Colin had attached to HADOOP-11064 for versioning in the library's file name. This can be considered a work-in-progress implementation of idea #2 in my first comment. (I say work-in-progress, because we haven't addressed winutils.exe yet in this patch.)
> 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
> Attachments: HADOOP-11064.003.patch
>
>
> 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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