Uma Maheswara Rao G created HDFS-15529:
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Summary: 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
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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