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https://issues.apache.org/jira/browse/HDFS-1865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13026861#comment-13026861
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dhruba borthakur commented on HDFS-1865:
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Oh ok, can you also explain the usecase why you have multiple instances of 
DFSClient inside the same jvm (aren't all config properties for file creation 
already part of the FileSystem.create api?)

> Share LeaseChecker thread among DFSClients
> ------------------------------------------
>
>                 Key: HDFS-1865
>                 URL: https://issues.apache.org/jira/browse/HDFS-1865
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs client
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>
> Each {{DFSClient}} runs a {{LeaseChecker}} thread within a JVM.  The number 
> threads could be reduced by sharing the threads.

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