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https://issues.apache.org/jira/browse/HDFS-5548?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Haohui Mai updated HDFS-5548:
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Attachment: HDFS-5548.001.patch
> Use ConcurrentHashMap in portmap
> --------------------------------
>
> Key: HDFS-5548
> URL: https://issues.apache.org/jira/browse/HDFS-5548
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Attachments: HDFS-5548.000.patch, HDFS-5548.001.patch
>
>
> Portmap uses a HashMap to store the port mapping. It synchronizes the access
> of the hash map by locking itself. It can be simplified by using a
> ConcurrentHashMap.
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