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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-5020) Make DatanodeProtocol#blockReceivedAndDeleted idempotent
Date Tue, 23 Jul 2013 08:42:49 GMT

     [ https://issues.apache.org/jira/browse/HDFS-5020?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jing Zhao updated HDFS-5020:
----------------------------

    Attachment: HDFS-5020.002.patch

Fix the failed test and add a new unit test.
                
> Make DatanodeProtocol#blockReceivedAndDeleted idempotent
> --------------------------------------------------------
>
>                 Key: HDFS-5020
>                 URL: https://issues.apache.org/jira/browse/HDFS-5020
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 3.0.0
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-5020.001.patch, HDFS-5020.002.patch
>
>
> Currently DatanodeProtocol#blockReceivedAndDeleted is not idempotent because pending
replication maps in NN only tracks the number of the pending replicas, and a retry request
about a received block can cause the pending number decreased more than once. We can make
blockReceivedAndDeleted idempotent by tracking corresponding datanodes in the pending replication
map. 

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