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https://issues.apache.org/jira/browse/HDFS-10568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15355485#comment-15355485
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Akira Ajisaka commented on HDFS-10568:
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LGTM, +1.
> Reuse ObjectMapper instance in CombinedHostsFileReader and
> CombinedHostsFileWriter
> ----------------------------------------------------------------------------------
>
> Key: HDFS-10568
> URL: https://issues.apache.org/jira/browse/HDFS-10568
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Reporter: Yiqun Lin
> Assignee: Yiqun Lin
> Attachments: HDFS-10568.001.patch, HDFS-10568.002.patch
>
>
> The {{ObjectMapper}} instance is not reused in class
> {{CombinedHostsFileReader}} and {{CombinedHostsFileWriter}}. We can reuse
> them to improve performance.
> Here are related issues: HDFS-9724, HDFS-9768.
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