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From "Zesheng Wu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-4916) DataTransfer may mask the IOException during block transfering
Date Thu, 20 Jun 2013 01:51:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zesheng Wu updated HDFS-4916:
-----------------------------

    Status: Patch Available  (was: Open)
    
> DataTransfer may mask the IOException during block transfering
> --------------------------------------------------------------
>
>                 Key: HDFS-4916
>                 URL: https://issues.apache.org/jira/browse/HDFS-4916
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.0.4-alpha, 2.0.5-alpha
>            Reporter: Zesheng Wu
>            Priority: Blocker
>         Attachments: 4916.v0.patch
>
>
> When a new datanode is added to the pipeline, the client will trigger the block transfer
process. In the current implementation, the src datanode calls the run() method of the DataTransfer
to transfer the block, this method will mask the IOExceptions during the transfering, and
will make the client not realize the failure during the transferring, as a result the client
will mistake the failing transferring as successful one. 

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