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https://issues.apache.org/jira/browse/HDFS-173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12750631#action_12750631
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Suresh Srinivas commented on HDFS-173:
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Failing test TestBlocksWithNotEnoughRack is not related to this patch.
> Recursively deleting a directory with millions of files makes NameNode
> unresponsive for other commands until the deletion completes
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-173
> URL: https://issues.apache.org/jira/browse/HDFS-173
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Fix For: 0.21.0
>
> Attachments: HDFS-173.1.patch, HDFS-173.2.patch, HDFS-173.3.patch,
> HDFS-173.4.patch, HDFS-173.patch
>
>
> Delete a directory with millions of files. This could take several minutes
> (observed 12 mins for 9 million files). While the operation is in progress
> FSNamesystem lock is held and the requests from clients are not handled until
> deletion completes.
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