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https://issues.apache.org/jira/browse/SOLR-11873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16342708#comment-16342708
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Mark Miller commented on SOLR-11873:
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Caught a short little flu. Will try and get to this today or tomorrow.
> Use time based expiration cache in all places in HdfsDirectoryFactory
> ---------------------------------------------------------------------
>
> Key: SOLR-11873
> URL: https://issues.apache.org/jira/browse/SOLR-11873
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: hdfs
> Affects Versions: 7.2
> Reporter: Mihaly Toth
> Assignee: Mark Miller
> Priority: Major
>
> {{HdfsDirectoryFactory.exists()}} method already applies caching on
> FileSystem objects. This is not done yet in the {{size()}} method.
> This function is eventually used when querying the core status. Each and
> every query will use the same configuration and start from the first
> configured HDFS NameNode. If that is down Solr will always access this down
> node first without "learning".
> It would be nice to apply the same caching on that function too.
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