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https://issues.apache.org/jira/browse/HADOOP-3933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622942#action_12622942
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Raghu Angadi commented on HADOOP-3933:
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+1. The build failures are known problems (e.g. HADOOP-3650). I don't think 
this needs a unit test.

> DataNode's BlockSender sends more data than necessary
> -----------------------------------------------------
>
>                 Key: HADOOP-3933
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3933
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.16.0
>            Reporter: Ning Li
>            Assignee: Ning Li
>            Priority: Minor
>             Fix For: 0.19.0
>
>         Attachments: hadoop-3933.patch
>
>
> DataNode's BlockSender sends more data than necessary because of how it 
> computes endOffset.

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