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https://issues.apache.org/jira/browse/HDFS-17938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18093107#comment-18093107
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ASF GitHub Bot commented on HDFS-17938:
---------------------------------------

Hexiaoqiao commented on PR #8566:
URL: https://github.com/apache/hadoop/pull/8566#issuecomment-4861871028

   @fuchaohong would you mind to check failed unit tests?




> Add the metrics NumBlocks in datanode.
> --------------------------------------
>
>                 Key: HDFS-17938
>                 URL: https://issues.apache.org/jira/browse/HDFS-17938
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>            Reporter: fuchaohong
>            Priority: Major
>              Labels: pull-request-available
>
> Add the NumBlocks metric, which can be used to warn about the heap size of 
> the DataNode.



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