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https://issues.apache.org/jira/browse/HDFS-585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12752611#action_12752611
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Hairong Kuang commented on HDFS-585:
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1. I think DataNode should get the on-disk block length from ReplicaInfo not
from disk because DataNode guarantees that crc file is also updated when
updating the replica's in-memory bytesOnDisk.
2. Should we have unit tests testing reading from an unclosed file?
> Datanode should serve up to visible length of a replica for read requests
> -------------------------------------------------------------------------
>
> Key: HDFS-585
> URL: https://issues.apache.org/jira/browse/HDFS-585
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node
> Affects Versions: Append Branch
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Fix For: Append Branch
>
> Attachments: h585_20090903.patch, h585_20090904.patch,
> h585_20090904b.patch
>
>
> As a part of the design in HDFS-265, datanodes should return all bytes within
> the visible length of a replica to the DFSClient in order to support read
> consistency.
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