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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 ------- 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 ----- ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeHelper.java 9aa9e31a21 Diff: https://reviews.apache.org/r/62414/diff/1/ Testing ------- PENDING... Thanks, Jonathan Hurley