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https://issues.apache.org/jira/browse/YARN-1001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13760460#comment-13760460
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Zhijie Shen commented on YARN-1001:
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bq. we are expecting /ws/v1/cluster/appscount to provide all
app-types/state-counts in 1 call
To prevent RM from being overwhelmed, when no params is specified, the API
returns a empty response. Users must supply the states and the types (at least
one) to get the counts.
bq. Apart from that, we need /ws/v1/cluster/appscount information pushed to
Ganglia.
Though some discussion, we'd like to exclude this requirement from the scope of
this jira due to the performance concern. We can open a ticket to trace it
separately.
Another issue we need to clarify is that the counts depend on the current apps
in RMContext. Old finished apps may be removed from the context if the total
app number reaches the limit. Therefore, the count of "completed" apps may only
reflect the count of those in RMContext. Should emphasize the apps in RMContext
in the document.
> YARN should provide per application-type and state statistics
> -------------------------------------------------------------
>
> Key: YARN-1001
> URL: https://issues.apache.org/jira/browse/YARN-1001
> Project: Hadoop YARN
> Issue Type: Task
> Components: api
> Affects Versions: 2.1.0-beta
> Reporter: Srimanth Gunturi
> Assignee: Zhijie Shen
> Attachments: YARN-1001.1.patch
>
>
> In Ambari we plan to show for MR2 the number of applications finished,
> running, waiting, etc. It would be efficient if YARN could provide per
> application-type and state aggregated counts.
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