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https://issues.apache.org/jira/browse/YARN-1701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13896161#comment-13896161
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Gera Shegalov commented on YARN-1701:
-------------------------------------
Tried to explain in the description: hadoop.log.dir refers to a location under
a local OS mount point. FileSystemApplicationHistoryStore uses DFS by default.
So you end up with directories like this on HDFS:
{code}
-rw-r----- 3 myuser supergroup 4306 2014-02-08 15:34
/Users/gshegalov/apache/hadoop-trunk/hadoop-dist/target/hadoop-3.0.0-SNAPSHOT/logs/yarn/system/ahstore/ApplicationHistoryDataRoot/application_1391896835931_0001
{code}
> More intuitive defaults for AHS
> -------------------------------
>
> Key: YARN-1701
> URL: https://issues.apache.org/jira/browse/YARN-1701
> Project: Hadoop YARN
> Issue Type: Sub-task
> Affects Versions: 2.4.0
> Reporter: Gera Shegalov
> Assignee: Gera Shegalov
> Attachments: YARN-1701.v01.patch
>
>
> When I enable AHS via yarn.ahs.enabled, the app history is still not visible
> in AHS webUI. This is due to NullApplicationHistoryStore as
> yarn.resourcemanager.history-writer.class. It would be good to have just one
> key to enable basic functionality.
> yarn.ahs.fs-history-store.uri uses {code}${hadoop.log.dir}{code}, which is
> local file system location. However, FileSystemApplicationHistoryStore uses
> DFS by default.
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