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https://issues.apache.org/jira/browse/HADOOP-3169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12616211#action_12616211
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Raghu Angadi commented on HADOOP-3169:
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+1 for simple locking using LeaseChecker object instead of AtomicBoolean and a
synchronizedSortedMap.
Also should the LeaseChecker thread be closed when there are no leases pending
for a few seconds or so? The justification is same as the one for delaying
creation of the thread.
> LeaseChecker daemon should not be started in DFSClient constructor
> ------------------------------------------------------------------
>
> Key: HADOOP-3169
> URL: https://issues.apache.org/jira/browse/HADOOP-3169
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: 3169_20080718.patch, 3169_20080721.patch,
> 3169_20080723b.patch
>
>
> LeaseChecker daemon periodically renew leases with NameNode. However, if
> there is no file creation, LeaseChecker daemon should not be started for
> saving resources and better performance.
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