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https://issues.apache.org/jira/browse/YARN-5184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15652388#comment-15652388
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Sangjin Lee commented on YARN-5184:
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Hmm, I definitely understand the desire to minimize incompatibilities even for
major versions. On the other hand, it might not be best if we say zero
incompatibilities even for a major version upgrade. That would severely limit
the ability to make more substantial changes to deliver useful features and get
rid of tech debt, and so on. I think you would agree that there needs to be a
happy medium here.
I don't have a strong opinion on this specific one for 3.0. If you feel
strongly that this would be a major issue for 3.0, I'd be happy to keep the
default methods. Do let me know, and I will update the patches and this JIRA.
Thanks!
> Fix up incompatible changes introduced on ContainerStatus and NodeReport
> ------------------------------------------------------------------------
>
> Key: YARN-5184
> URL: https://issues.apache.org/jira/browse/YARN-5184
> Project: Hadoop YARN
> Issue Type: Bug
> Components: api
> Affects Versions: 2.8.0, 2.9.0
> Reporter: Karthik Kambatla
> Assignee: Sangjin Lee
> Priority: Blocker
> Attachments: YARN-5184-branch-2.8.poc.patch,
> YARN-5184-branch-2.poc.patch
>
>
> YARN-2882 and YARN-5430 broke compatibility by adding abstract methods to
> ContainerStatus. Since ContainerStatus is a Public-Stable class, adding
> abstract methods to this class breaks any extensions.
> To fix this, we should add default implementations to these new methods and
> not leave them as abstract.
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