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https://issues.apache.org/jira/browse/HADOOP-11127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14148595#comment-14148595
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Colin Patrick McCabe commented on HADOOP-11127:
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bq. The trouble for hadoop-common.jar is that I have no idea how to make this
play well with the Apache Hadoop release process. Apparently, we've made a
prior decision to stop shipping a native build and leave this as a distro
concern, such as in BigTop. We'd have to reverse that decision.
Yeah, we were supposed to stop shipping libhadoop.so in the tarball. I looked
at
http://mirrors.ibiblio.org/apache/hadoop/common/hadoop-2.5.1/hadoop-2.5.1.tar.gz
and it was still in there, which is kind of weird. I wonder which platform
the version in there is for?
If libhadoop.so isn't supposed to be in the tarball now, surely removing it
isn't a regression? We don't have a tarball per platform so it really doesn't
make sense to put libhadoop in there. I would like to see libhadoop.so make it
back into the release (perhaps in the form of multiple flavors of
{{hadoop-native.jar}} available for download?) but that seems like a separate
issue which shouldn't block this issue.
> 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
>
> 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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