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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4127) Log message is not correct in case of short of replica
Date Mon, 29 Oct 2012 17:46:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13486191#comment-13486191
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Junping Du commented on HDFS-4127:
----------------------------------

Hi Suresh, Please check the patch with an example there in unit test. In this example, we
have 6 data nodes but 2 nodes is not available due to low space. Then, placing 6 replicas
should cause a warn with reporting short of 2 replicas. In previous (without this patch),
it will report a short of 3 replicas which is wrong. I think we will meet this warn error
very common in small scale (<10) cluster, as map-reduce job file will be placed with a
lot of replicas. Isn't it?
                
> Log message is not correct in case of short of replica
> ------------------------------------------------------
>
>                 Key: HDFS-4127
>                 URL: https://issues.apache.org/jira/browse/HDFS-4127
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 1.0.4, 2.0.2-alpha
>            Reporter: Junping Du
>            Assignee: Junping Du
>            Priority: Minor
>         Attachments: HDFS-4127.patch
>
>
> For some reason that block cannot be placed with enough replica (like no enough available
data nodes), it will throw a warning with wrong number of replica in short.

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