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https://issues.apache.org/jira/browse/HDFS-5043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725978#comment-13725978
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Tsz Wo (Nicholas), SZE commented on HDFS-5043:
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We should also merge this to branch-2.1-beta. Then, this will be available in
2.1.1 (if we cannot merge this to 2.1.0.)
> For HdfsFileStatus, set default value of childrenNum to -1 instead of 0 to
> avoid confusing applications
> -------------------------------------------------------------------------------------------------------
>
> Key: HDFS-5043
> URL: https://issues.apache.org/jira/browse/HDFS-5043
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0
> Reporter: Brandon Li
> Assignee: Brandon Li
> Fix For: 3.0.0, 2.3.0
>
> Attachments: HDFS-5043.patch, HDFS-5043.patch.2
>
>
> Per discussion in HDFS-4772, default value 0 can confuse application since it
> can't tell that childNum is not supported by the server or the directory has
> no child.
> Use -1 instead to avoid this confusion.
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