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https://issues.apache.org/jira/browse/HADOOP-6356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12774757#action_12774757
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dhruba borthakur commented on HADOOP-6356:
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My opinion is to not add a cache. The current cache implementation helps
performance because the compatible-version-check is done only once per
filesystem object. However, this approach is not very correct because the
server could have restarted with a different version of the software. I think
it is appropriate to do the compatible-version-check for each RPC instead of
doing it per creation-of-FileSystem object.
> Add a Cache for AbstractFileSystem in the new FileContext/AbstractFileSystem
> framework.
> ---------------------------------------------------------------------------------------
>
> Key: HADOOP-6356
> URL: https://issues.apache.org/jira/browse/HADOOP-6356
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 0.22.0
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Fix For: 0.22.0
>
>
> The new filesystem framework, FileContext and AbstractFileSystem does not
> implement a cache for AbstractFileSystem.
> This Jira proposes to add a cache to the new framework just like with the old
> FileSystem.
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