Siddharth Wagle reopened AMBARI-21664:

Installing Flume without HDFS Fails as ZK, AMS and SmartSense cannot start: 
Configuration parameter 'hdfs-site' was not found in configurations dictionary 

HST Server, ZK server, metrics monitor fail to start
resource_management.core.exceptions.Fail: Configuration parameter 'hdfs-site' 
was not found in configurations dictionary!

> HDFS namenode rpc and connection load metrics are not showing
> -------------------------------------------------------------
>                 Key: AMBARI-21664
>                 URL: https://issues.apache.org/jira/browse/AMBARI-21664
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-metrics
>    Affects Versions: 2.5.2
>         Environment: CentOS 7, IOP 4.2 upgrade to Ambari 2.5.2
>            Reporter: Eric Yang
>            Assignee: Siddharth Wagle
>             Fix For: 2.5.2
>         Attachments: AMBARI-21664.patch, AMBARI-21664_trunk.patch
> After upgrading from IOP 4.2 to HDP 2.6 with Ambari 2.5.2, there are two 
> metrics widget don't show the right results.
> Namenode RPC and Namenode Connection Load graph don't show any data.  This 
> might be caused by different implementation to fetch metrics data for those 
> two graphs in IOP.  Check if there is a way to bridge the gap by updating 
> widget information or document this and ask user to remove the widget.

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