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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-3240) [Data Mode] Implement client API to put generic entities
Date Sat, 21 Feb 2015 00:29:11 GMT

     [ https://issues.apache.org/jira/browse/YARN-3240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Zhijie Shen updated YARN-3240:
    Attachment: YARN-3240.1.patch

In this Jira, I aim to make the basic client write APIs ready. Later on, we can add more advanced
APIs to simply putting predefined data, such as flow. Bellow is the summary of this patch:

1. Added the two Java methods of TimelineClient to operate the new generic timeline entity
data object. One is for blocking call, while the other is for the async call. The two methods
wrap over the same REST HTTP API, but giving different "async" param. At the server side,
the aggregator can consume this param to determine whether to use sync or asycn call to persist
the timeline data.

It needs the resource URI and the context appID to know where the request should be sent to
and which conceptual per-app aggregator should be routed to. This is blocked by YARN-3039.
For now, I just leave them unset in the code.

2. Change the endpoint at per-node web service accordingly to make the client and the server
be paired.

3. One more data object, TimelineEntities, which is the collection of TimelineEntity, is added
to host multiple entities for one request to the aggregator.

The rationale behind putting the new client API inside the existing timeline client is:

1. Most of TimelineClientImpl code could be reused, including making HTTP calls, security,
retry and so on.

2. Not all the client APIs will be deprecated, but just those that operate on the old data
model. For example, delegation token related APIs may still stay.

> [Data Mode] Implement client API to put generic entities
> --------------------------------------------------------
>                 Key: YARN-3240
>                 URL: https://issues.apache.org/jira/browse/YARN-3240
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
>         Attachments: YARN-3240.1.patch

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