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https://issues.apache.org/jira/browse/YARN-956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13726873#comment-13726873
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Zhijie Shen commented on YARN-956:
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One more thought about HistoryStorage. Does HistoryStorage need to extend
AbstractService, such that we can make use of the life cycle: init() can be
used to prepare the storage and stop() can be used to release the storage. For
In-memory HistoryStorage, these two steps may be not necessary, because the
memory will be eventually released by GC. However, FileSystem HistoryStorage
will need these two steps (see YARN-975). However, I think it's good to be
consistent among all the implementations. Other implementations, such as DB
HistoryStorage, may also need to the steps to setup the connection and to
disconnect. Thoughts?
> [YARN-321] Add History Store interface and testable in-memory HistoryStorage
> ----------------------------------------------------------------------------
>
> Key: YARN-956
> URL: https://issues.apache.org/jira/browse/YARN-956
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Vinod Kumar Vavilapalli
> Assignee: Mayank Bansal
> Attachments: YARN-956-1.patch, YARN-956-2.patch, YARN-956-3.patch
>
>
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