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https://issues.apache.org/jira/browse/HDFS-2288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13105081#comment-13105081
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Konstantin Shvachko commented on HDFS-2288:
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Yes, this is how it was designed. In case of DN failure you need to wait until
the rbw block is recovered to see its data. Can you see it after recovery?
Making the data available earlier will be an optimization.
Also in normal operation it is not likely that all 3 nodes for that block
crash, so you will be able to read data from other nodes while the failed
replica is recovering.
> Replicas awaiting recovery should return a full visible length
> --------------------------------------------------------------
>
> Key: HDFS-2288
> URL: https://issues.apache.org/jira/browse/HDFS-2288
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 0.23.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.23.0
>
> Attachments: hdfs-2288.txt
>
>
> Currently, if the client calls getReplicaVisibleLength for a RWR, it returns
> a visible length of 0. This causes one of HBase's tests to fail, and I
> believe it's incorrect behavior.
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