[jira] [Created] (AMBARI-7458) Some HA Config Properties not visible after Blueprint Export of running cluster

["Robert Nettleton (JIRA)" <ji...@apache.org>]

Robert Nettleton created AMBARI-7458:
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             Summary: Some HA Config Properties not visible after Blueprint Export of running cluster
                 Key: AMBARI-7458
                 URL: https://issues.apache.org/jira/browse/AMBARI-7458
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: 1.6.0
            Reporter: Robert Nettleton
            Assignee: Robert Nettleton
             Fix For: 1.7.0


Once Namenode High-Availability is enabled on a running cluster started by Ambari, an attempt to export a Blueprint based on this cluster will be missing two properties:

"fs.defaultFS" from core-site.xml
"hbase.rootdir" from hbase-site.xml

The properties are not included in the exported Blueprint due to an error in the Blueprint Configuration Processor.  Any properties during the export process that should include host information but do not will be removed from the configuration maps for the exported Blueprint. 

Generally, this is the correct way to process these configuration properties, but a few properties (including the two listed above) can use references to HA "nameservices", rather than refer to a specific hostname.  

The current BlueprintConfigurationProcessor's export logic needs to be updated to account for the case of some properties either containing host information or a nameservice reference.  In Ambari 1.7, the fix for this will likely be a short-term fix.  In the longer term, it would be more desirable to include metadata in the stack definitions that allow the Blueprint processor to determine which properties are affected by enabling HA.  

I'm working on a patch to fix this, and will be submitting it soon. 



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