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https://issues.apache.org/jira/browse/MAPREDUCE-7073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Akira Ajisaka updated MAPREDUCE-7073:
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Fix Version/s: (was: 2.9.1)
2.9.2
> Optimize TokenCache#obtainTokensForNamenodesInternal
> ----------------------------------------------------
>
> Key: MAPREDUCE-7073
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7073
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Priority: Major
> Fix For: 2.10.0, 2.8.4, 3.2.0, 3.0.3, 3.1.1, 2.9.2
>
> Attachments: MAPREDUCE-7073.001.patch, MAPREDUCE-7073.002.patch
>
>
> {{FileInputFormat#listStatus}} is too slow file system cache is disabled.
> {{TokenCache#obtainTokensForNamenodesInternal}} for every filesystem instance
> {{Master.getMasterPrincipal(conf)}} is caled which reloads YarnConfiguration .
> For fileInput with 1k file will reload YarnConfiguration 1k times.
> {{Master.getMasterPrincipal(conf)}} can be passed for
> {{obtainTokensForNamenodesInternal}} per filesystem call.
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