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https://reviews.apache.org/r/61000/
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Review request for Ambari, Attila Doroszlai, Alejandro Fernandez, Jonathan 
Hurley, and Tim Thorpe.


Bugs: AMBARI-21527
    https://issues.apache.org/jira/browse/AMBARI-21527


Repository: ambari


Description
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dfs.namenode.rpc-address gets merged in during EU with default value 
"localhost:8020". Both the host and port could be wrong and cause issues during 
HDFS restart. NN restart for kerberos cluster and remote DN restart for non 
secured cluster. 

This is because HDFS Py script looks for that property first and uses it if it 
exists. This logic and the fact that the property (seems unnecessarily) merged 
in during EU with "localhost:8020" as the value was what caused the issues in 
our tests.


Diffs
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ambari-server/src/main/resources/stacks/BigInsights/4.2.5/upgrades/config-upgrade.xml
 e476d57 
  
ambari-server/src/main/resources/stacks/BigInsights/4.2.5/upgrades/nonrolling-upgrade-to-hdp-2.6.xml
 cbd0550 
  
ambari-server/src/main/resources/stacks/BigInsights/4.2/upgrades/config-upgrade.xml
 dada6e2 
  
ambari-server/src/main/resources/stacks/BigInsights/4.2/upgrades/nonrolling-upgrade-to-hdp-2.6.xml
 3ea20ed 


Diff: https://reviews.apache.org/r/61000/diff/1/


Testing
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tested as part of the EU


Thanks,

Di Li

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