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https://issues.apache.org/jira/browse/HDFS-8135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Busbey reopened HDFS-8135:
-------------------------------

This change breaks HBase.

The comment at the start of the removed class was 

{code}
- * @deprecated Please use {@link HdfsConstants}. This class
- * is left only for other ecosystem projects which depended on
- * it for SafemodeAction and DatanodeReport types.
- */
{code}

A few things

# please mark this change as breaking and include a release note, since hte 
javadocs expressly say it was there for ecosystem projecs (even though it does 
not carry a proper InterfaceAudience annotation)
# consider limiting this change to trunk and leave it out of branch-2
# HdfsConstants is labeled InterfaceAudience.Private, so what am I supposed to 
move HBase to?

> Remove the deprecated FSConstants class
> ---------------------------------------
>
>                 Key: HDFS-8135
>                 URL: https://issues.apache.org/jira/browse/HDFS-8135
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Haohui Mai
>            Assignee: Li Lu
>             Fix For: 2.8.0
>
>         Attachments: HDFS-8135-041315.patch
>
>
> The {{FSConstants}} class has been marked as deprecated since 0.23. There is 
> no uses of this class in the current code base and it can be removed.



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