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https://issues.apache.org/jira/browse/YARN-5571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15443134#comment-15443134
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Rohith Sharma K S commented on YARN-5571:
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I believe design is made keeping in mind that federation support. But debatably
with rarest scenario, what is app-id/user-id/flowname/flowurnid are same!!!
Here cluster-id would come into picture. One one thing guarantee is
cluster-id/namespace will be different. In the REST endpoints I see that
cluster-id is null.
There is slight differentiation with in the output of below required I believe
# GET /ws/v2/timeline/clusters/\{cluster name\}/apps/\{app id\} : Query for an
App-id for an specified cluster-name in pathParam. Here, queryParam is not
useful right?
# GET /ws/v2/timeline/apps/\{app id\} : Query for an app-id for ALL the cluster
from storage.
I would appreciate if you can point out me any flow-diagram/sequence-diagram
for storage if any.
> [Atsv2] Query App REST endpoing need not to expose queryParams such
> userId/flowname/flowrunid
> ---------------------------------------------------------------------------------------------
>
> Key: YARN-5571
> URL: https://issues.apache.org/jira/browse/YARN-5571
> Project: Hadoop YARN
> Issue Type: Bug
> Components: timelinereader
> Reporter: Rohith Sharma K S
> Assignee: Rohith Sharma K S
>
> Timeline reader provides REST end point for querying app with an URL {{GET
> /ws/v2/timeline/apps/\{app id\}}} along with queryParam as an filter. But
> queryParam such as {{userId/flowname/flowrunid}} not at useful for querying
> an app with app-id. In YARN cluster, only one app-id will be exist though out
> life time. So userId/flowname/flowrunid not at all useful for the app-id REST
> empoint
> {noformat}
> @GET
> @Path("/apps/{appid}/")
> @Produces(MediaType.APPLICATION_JSON)
> public TimelineEntity getApp(
> @Context HttpServletRequest req,
> @Context HttpServletResponse res,
> @PathParam("appid") String appId,
> @QueryParam("flowname") String flowName,
> @QueryParam("flowrunid") String flowRunId,
> @QueryParam("userid") String userId,
> @QueryParam("confstoretrieve") String confsToRetrieve,
> @QueryParam("metricstoretrieve") String metricsToRetrieve,
> @QueryParam("fields") String fields,
> @QueryParam("metricslimit") String metricsLimit) {
> return getApp(req, res, null, appId, flowName, flowRunId, userId,
> confsToRetrieve, metricsToRetrieve, fields, metricsLimit);
> }
> {noformat}
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