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https://issues.apache.org/jira/browse/HDFS-3085?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uma Maheswara Rao G resolved HDFS-3085.
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Target Version/s: (was: )
Resolution: Won't Fix
Closing this as client failed DN refreshing functionality already added in
latest code IIRC.
> Local data node may need to reconsider for read, when reading a very big file
> as that local DN may get recover in some time.
> ----------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-3085
> URL: https://issues.apache.org/jira/browse/HDFS-3085
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode, hdfs-client
> Affects Versions: 2.0.0-alpha
> Reporter: Uma Maheswara Rao G
> Priority: Major
>
> While reading the file, we will add the DN to deadNodes list and will skip
> from reads.
> If we are reading very huge file (may take hours), and failed read from local
> datanode, then this will be added to deadnode list and will be excluded for
> the further reads for that file.
> If the local node recovered immediately,but that will not used for further
> read. Read may continue with the remote nodes. It will effect the read
> performance.
> It will be good if we reconsider the local node after certain period based on
> some factors.
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