Local data node may need to reconsider for read, while reading a very big file
as it may get recover in some time.
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Key: HDFS-3085
URL: https://issues.apache.org/jira/browse/HDFS-3085
Project: Hadoop HDFS
Issue Type: Improvement
Components: data-node, hdfs client
Affects Versions: 0.24.0
Reporter: Uma Maheswara Rao G
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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