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Review request for Ambari, Alejandro Fernandez, Nate Cole, and Sebastian Toader. Bugs: AMBARI-18262 https://issues.apache.org/jira/browse/AMBARI-18262 Repository: ambari Description ------- Caused by: AMBARI-18240, in enable namenode HA wizard, failure happened at "Start Additional NameNode" step. The new logic from AMBARI-18240 assumed only 1 entry for active and standby. Since both NNs were "standby" it was only returning a tuple with the first NN in it. We should not be assuming [0] and instead be iterating over the tuple. Diffs ----- ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/scripts/hdfs_namenode.py 63d72aa Diff: https://reviews.apache.org/r/51430/diff/ Testing ------- Verified the UI Wizard completes now. Writing a new test to cover the change ... Thanks, Jonathan Hurley