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https://reviews.apache.org/r/62414/
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Review request for Ambari, Nate Cole and Robert Levas.


Bugs: AMBARI-21999
    https://issues.apache.org/jira/browse/AMBARI-21999


Repository: ambari


Description
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STR:
- Install a stack, such as HDP 2.3
- Modify the {{cluster-env/stack_features}} structure
- Upgrade to HDP 2.6

The auto-merge which happens can't properly merge 
{{cluster-env/stack_features}} since it has deviated from the stock values of 
HDP 2.3. This is dangerous since this is needed for proper operation.

Because it's defined as a read-only value, we should be able to detect this in 
the auto-merge fro the upgrade and force it to the new stack's default value...


Diffs
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  ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeHelper.java 
9aa9e31a21 


Diff: https://reviews.apache.org/r/62414/diff/1/


Testing
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PENDING...


Thanks,

Jonathan Hurley

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