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https://reviews.apache.org/r/61414/
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Review request for Ambari, Dmytro Grinenko, Dmitro Lisnichenko, and Nate Cole.


Bugs: AMBARI-21656
    https://issues.apache.org/jira/browse/AMBARI-21656


Repository: ambari


Description
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When creating a downgrade from either a {{PATCH}} or {{SERVICE}} upgrade, the 
following is observed:

- Things like "set version on all hosts" runs
- The upgrade "services" structure is empty, indicating an entire cluster is 
being downgraded


Diffs
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ambari-server/src/main/java/org/apache/ambari/server/controller/internal/VersionDefinitionResourceProvider.java
 629f3cd771 
  
ambari-server/src/main/java/org/apache/ambari/server/state/RepositoryType.java 
215cab85cf 
  
ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeContext.java 
8bf0400753 


Diff: https://reviews.apache.org/r/61414/diff/1/


Testing
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PENDING... still need to write the UTs to cover the UpgradeContext being 
initialized correctly on DOWNGRADE.


Thanks,

Jonathan Hurley

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