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From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-3401) [Data Model] users should not be able to create a generic TimelineEntity and associate arbitrary type
Date Thu, 26 Mar 2015 18:13:53 GMT
Sangjin Lee created YARN-3401:
---------------------------------

             Summary: [Data Model] users should not be able to create a generic TimelineEntity
and associate arbitrary type
                 Key: YARN-3401
                 URL: https://issues.apache.org/jira/browse/YARN-3401
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: timelineserver
            Reporter: Sangjin Lee


IIUC it is possible for users to create a generic TimelineEntity and set an arbitrary entity
type. For example, for a YARN app, the right entity API is ApplicationEntity. However, today
nothing stops users from instantiating a base TimelineEntity class and set the application
type on it. This presents a problem in handling these YARN system entities in the storage
layer for example.

We need to ensure that the API allows only the right type of the class to be created for a
given entity type.



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