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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-870) Topology is permanently cached
Date Thu, 07 Jan 2010 16:45:54 GMT

    [ https://issues.apache.org/jira/browse/HDFS-870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12797681#action_12797681
] 

Allen Wittenauer commented on HDFS-870:
---------------------------------------

No, but there should be a way to flush it when it does other than restart (== grid down time)
when it does, esp. considering we can dynamically add/remove nodes (to some degree).

> Topology is permanently cached
> ------------------------------
>
>                 Key: HDFS-870
>                 URL: https://issues.apache.org/jira/browse/HDFS-870
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Allen Wittenauer
>
> Replacing the topology script requires a namenode bounce because the NN caches the information
permanently.  It should really either expire it periodically or expire on -refreshNodes.

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