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https://issues.apache.org/jira/browse/HADOOP-9998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13778884#comment-13778884
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Colin Patrick McCabe commented on HADOOP-9998:
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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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