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https://issues.apache.org/jira/browse/HDFS-5986?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron T. Myers updated HDFS-5986:
---------------------------------

    Issue Type: Improvement  (was: Bug)

Seems like a decent idea to me. We should expose this as a metric as well, if 
not also in the NN web UI.

> Capture the number of blocks pending deletion on namenode webUI
> ---------------------------------------------------------------
>
>                 Key: HDFS-5986
>                 URL: https://issues.apache.org/jira/browse/HDFS-5986
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: Suresh Srinivas
>
> When a directory that has large number of directories and files are deleted, 
> the namespace deletes the corresponding inodes immediately. However it is 
> hard to to know when the invalidated blocks are actually deleted on the 
> datanodes, which could take a while.
> I propose adding on namenode webUI, along with under replicated blocks, the 
> number of blocks that are pending deletion.



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