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https://issues.apache.org/jira/browse/HDFS-1393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur resolved HDFS-1393.
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Resolution: Duplicate
duplicate of HDFS-1143
> When a directory with huge number of files is deleted, the NN becomes
> unresponsive
> ----------------------------------------------------------------------------------
>
> Key: HDFS-1393
> URL: https://issues.apache.org/jira/browse/HDFS-1393
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Reporter: dhruba borthakur
>
> If one deletes a directory with about 2 million files, the namenode becomes
> unresponsive for close to 20 seconds. The reason being that the FSnamesystem
> lock is held while all the blocks/namespace-entries are freed.
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