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https://issues.apache.org/jira/browse/HDFS-13212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16381651#comment-16381651
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Weiwei Wu commented on HDFS-13212:
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[~maobaolong] The MountTableResolver periodically fetch mount table, clean the
locationCaches which mount points has change(add / remove / modify operations
after this patch).
This will ensure consistency on both sides(router and state store), and no need
to clean entire locationCache periodically.
> RBF: Fix router location cache issue
> ------------------------------------
>
> Key: HDFS-13212
> URL: https://issues.apache.org/jira/browse/HDFS-13212
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: federation, hdfs
> Reporter: Weiwei Wu
> Priority: Major
> Attachments: HDFS-13212-001.patch
>
>
> The MountTableResolver refreshEntries function have a bug when add a new
> mount table entry which already have location cache. The old location cache
> will never be invalid until this mount point change again.
> Need to invalid the location cache when add the mount table entries.
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