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https://issues.apache.org/jira/browse/YARN-975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13802337#comment-13802337
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Mayank Bansal commented on YARN-975:
------------------------------------
Yarn-default.xml
yarn.ahs.fs-history-store.uri should be defaulted to
${hadoop.log.dir}/yarn/system/ahstore
We need to have meta deta for the applications to be stored on the fs , I
think keeping the way JHS , keeping it on the file name is useful.
FileSystemApplicationHistoryStore.java
In service Init why we are using FS_RM_STATE_STORE_URI?
We also need to change the permissions for the root dir as all the users are
going to write the AHS store, so it should be writable by all the users.
<code>
ApplicationHistoryData historyData = getApplication(appId);
historyDataMap.put(appId, historyData);
</code>
getAllApplications() should have a check for null of historyData as this could
be null.
Why we are adding historyDataMap.put(appId, null); ? WHy we cant just don't
even add the app id in the history map?
> Add a file-system implementation for history-storage
> ----------------------------------------------------
>
> Key: YARN-975
> URL: https://issues.apache.org/jira/browse/YARN-975
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Zhijie Shen
> Assignee: Zhijie Shen
> Attachments: YARN-975.1.patch, YARN-975.2.patch, YARN-975.3.patch,
> YARN-975.4.patch, YARN-975.5.patch, YARN-975.6.patch, YARN-975.7.patch
>
>
> HDFS implementation should be a standard persistence strategy of history
> storage
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