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https://issues.apache.org/jira/browse/HDFS-4772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13708038#comment-13708038
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Tsz Wo (Nicholas), SZE commented on HDFS-4772:
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bq. optional uint32 childrenNum = 14 [default = 0];
If we set the default to 0, we cannot tell if it indeed does not have children
or not. How about setting the default to -1?
> Add number of children in HdfsFileStatus
> ----------------------------------------
>
> Key: HDFS-4772
> URL: https://issues.apache.org/jira/browse/HDFS-4772
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 3.0.0
> Reporter: Brandon Li
> Assignee: Brandon Li
> Priority: Minor
> Fix For: 3.0.0, 2.1.0-beta, 2.3.0
>
> Attachments: HDFS-4772.2.patch, HDFS-4772.3.patch,
> HDFS-4772.branch-2.patch, HDFS-4772.patch
>
>
> This JIRA is to track the change to return the number of children for a
> directory, so the client doesn't need to make a getListing() call to
> calculate the number of dirents. This makes it convenient for the client to
> check directory size change.
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