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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-870) Topology is permanently cached
Date Mon, 12 Apr 2010 04:17:42 GMT

    [ https://issues.apache.org/jira/browse/HDFS-870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12855832#action_12855832
] 

dhruba borthakur commented on HDFS-870:
---------------------------------------

Just for the records, we use topology script written in Java to avoid the problem listed in
HADOOP-5059

> 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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