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https://issues.apache.org/jira/browse/HDFS-1124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12862808#action_12862808
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Suresh Srinivas commented on HDFS-1124:
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Continuing previous comment...

There are several place in the code IOException needs to be replace by more 
specific exceptions. To name a few:
          o removeBlock, removeLastBlock
          o getCurrentUser
          o concat
          o setTimes
          o FSDirectory.getPreferredBlockSize()


> Replace IOException thrown in HDFS implementation to more specific exceptions
> -----------------------------------------------------------------------------
>
>                 Key: HDFS-1124
>                 URL: https://issues.apache.org/jira/browse/HDFS-1124
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: 0.22.0
>
>
> In HDFS, at several place IOException is thrown. This should be replaced by 
> more specific exception.

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