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https://issues.apache.org/jira/browse/HDFS-5043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13724721#comment-13724721
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Tsz Wo (Nicholas), SZE commented on HDFS-5043:
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HDFS-4772 was committed to 2.1.0. I think this should also go to 2.1.0,
otherwise, it is an incompatible change.
> 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
>
> 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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