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https://issues.apache.org/jira/browse/HDFS-15529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uma Maheswara Rao G resolved HDFS-15529.
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Fix Version/s: 3.4.0
Hadoop Flags: Reviewed
Resolution: Fixed
Thanks [~ayushsaxena] for review. I have committed this to trunk.
> getChildFilesystems should include fallback fs as well
> ------------------------------------------------------
>
> Key: HDFS-15529
> URL: https://issues.apache.org/jira/browse/HDFS-15529
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: viewfs, viewfsOverloadScheme
> Affects Versions: 3.4.0
> Reporter: Uma Maheswara Rao G
> Assignee: Uma Maheswara Rao G
> Priority: Critical
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Currently getChildSystems API used by many other APIs, like
> getAdditionalTokenIssuers, getTrashRoots etc.
> If fallBack filesystem not included in child filesystems, Application like
> YARN who uses getAdditionalTokenIssuers, would not get delegation tokens for
> fallback fs. This would be a critical bug for secure clusters.
> Similarly, trashRoots. when applications tried to use trashRoots, it will not
> considers trash folders from fallback. So, it will leak from cleanup logics.
>
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