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Posted to common-issues@hadoop.apache.org by "Junping Du (Updated) (JIRA)" <ji...@apache.org> on 2012/03/06 18:04:58 UTC

[jira] [Updated] (HADOOP-8144) pseudoSortByDistance in NetworkTopology doesn't work properly if no local node and first node is local rack node

     [ https://issues.apache.org/jira/browse/HADOOP-8144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Junping Du updated HADOOP-8144:
-------------------------------

    Attachment: HADOOP-8144-1.patch
    
> pseudoSortByDistance in NetworkTopology doesn't work properly if no local node and first node is local rack node
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-8144
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8144
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.23.0, 1.0.0
>            Reporter: Junping Du
>            Priority: Minor
>         Attachments: HADOOP-8144-1.patch
>
>
> pseudoSortByDistance in NetworkTopology.java should sort nodes according to its distance with reader as local node, local rack node, ... 
> But if there is no local node with reader in nodes and the first node is local rack node with reader, then it will put a random node at position 0.

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