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https://issues.apache.org/jira/browse/HADOOP-13714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16164964#comment-16164964
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Steve Loughran commented on HADOOP-13714:
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bq. I would assume a code that is not marked as unstable should be stable.
heh. It's private, so nominally "ours to play with". In reality, things like
UGI have long been public APIs, so caution is needed changing even those
things. If was mandatory to mark unstable code as @Unstable, then all which
would happen is a very large patch would mark everything as uch.
h3. protocol vs code
we can set things up so that Hadoop 2.8.0 JARs & the 2.8.2 JARs are internally
consistent even if you cant mix hadoop-common 2.8.0 and hadoo-hdfs-2.8.2. What
we can't do is expect everyone to upgrade to Hadoop 2.8.2 everywhere
simultaneously. Hence: protocols considered more sensitive to change
Audit logs
bq. Let’s say a certain event was not logged before but it should be.
The goal here is that the format remains parseable, even if a new event is
added. Maybe that should be explicit. Example: HDFS audit log.
bq. Regarding this let’s call out C compiler and and runtime requirements.
+1
> Tighten up our compatibility guidelines for Hadoop 3
> ----------------------------------------------------
>
> Key: HADOOP-13714
> URL: https://issues.apache.org/jira/browse/HADOOP-13714
> Project: Hadoop Common
> Issue Type: Improvement
> Components: documentation
> Affects Versions: 2.7.3
> Reporter: Karthik Kambatla
> Assignee: Daniel Templeton
> Priority: Blocker
> Attachments: Compatibility.pdf, HADOOP-13714.001.patch,
> HADOOP-13714.002.patch, HADOOP-13714.003.patch, HADOOP-13714.004.patch,
> HADOOP-13714.WIP-001.patch, InterfaceClassification.pdf
>
>
> Our current compatibility guidelines are incomplete and loose. For many
> categories, we do not have a policy. It would be nice to actually define
> those policies so our users know what to expect and the developers know what
> releases to target their changes.
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