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https://issues.apache.org/jira/browse/AMBARI-1442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13580810#comment-13580810
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Tom Beerbower commented on AMBARI-1442:
---------------------------------------
These metrics are being collected from Ganglia for the host_component resource.
Since the Ganglia metrics are collected over a period of time, we are
reporting the value from the last data point of that time period. If the
'point in time' metrics are available from JMX we should use it instead.
Look at all the host component metrics and make sure that they are obtained
from the right source.
> Host Component metrics always showing zero values
> -------------------------------------------------
>
> Key: AMBARI-1442
> URL: https://issues.apache.org/jira/browse/AMBARI-1442
> Project: Ambari
> Issue Type: Bug
> Reporter: Tom Beerbower
> Assignee: Tom Beerbower
> Fix For: 1.2.2
>
>
> In spite of the fact that some hadoop jobs that were performed, all fields of
> shuffle metrics have 0.0 values.
> Used the following request to get shuffle metrics:
> {code}
> api/v1/clusters/clusterName/hosts/hostName/host_components/TASKTRACKER?fields=metrics/mapred/shuffleOutput
> {code}
> Result:
> {code}
> "metrics" : {
> "mapred" : {
> "shuffleOutput" :
> { "shuffle_success_outputs" : 0, "shuffle_handler_busy_percent" : 0,
> "shuffle_output_bytes" : 0, "shuffle_failed_outputs" : 0,
> "shuffle_exceptions_caught" : 0 }
> }
> }
> {code}
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