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https://issues.apache.org/jira/browse/HDFS-9262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15042485#comment-15042485
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Arpit Agarwal commented on HDFS-9262:
-------------------------------------
Thanks for checking. Then let's go with the second option to have FsDatasetSpi
extend Reconfigurable.
The {{(ReconfigurableBase)data)}} cross-cast uses the non-obvious assumption
that FsDatasetImpl implements ReconfigurableBase so it's better to replace it.
> Reconfigure DN lazy writer interval on the fly
> ----------------------------------------------
>
> Key: HDFS-9262
> URL: https://issues.apache.org/jira/browse/HDFS-9262
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Affects Versions: 2.7.0
> Reporter: Xiaobing Zhou
> Assignee: Xiaobing Zhou
> Attachments: HDFS-9262.001.patch
>
>
> This is to reconfigure
> {code}
> dfs.datanode.lazywriter.interval.sec
> {code}
> without restarting DN.
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