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Posted to common-issues@hadoop.apache.org by "Colin Patrick McCabe (JIRA)" <ji...@apache.org> on 2013/09/26 17:18:03 UTC

[jira] [Commented] (HADOOP-9998) Only clear network location cache on specific nodes if invalid NetworkTopology happens

    [ https://issues.apache.org/jira/browse/HADOOP-9998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13778884#comment-13778884 ] 

Colin Patrick McCabe commented on HADOOP-9998:
----------------------------------------------

Let's make this a HADOOP jira rather than HDFS, since most of the change is to CachedDNSToSwitchMapping (a common component).
                
> Only clear network location cache on specific nodes if invalid NetworkTopology happens
> --------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9998
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9998
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: HDFS-5208-v1.patch, HDFS-5208-v2.patch
>
>
> After HDFS-4521, once a DN is registered with invalid networktopology, all cached rack info in DNSToSwitchMapping will be cleared. We should only clear cache on specific nodes.

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