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https://issues.apache.org/jira/browse/HDFS-13387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-13387 started by maobaolong.
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> Make multi-thread access class thread safe
> ------------------------------------------
>
>                 Key: HDFS-13387
>                 URL: https://issues.apache.org/jira/browse/HDFS-13387
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: 3.2.0
>            Reporter: maobaolong
>            Assignee: maobaolong
>            Priority: Major
>
> This jira will lead us to make the class as BlockInfoContiguous thread-safe, 
> then, we should not use the NameSystemLock to lock the full flow. This just a 
> base step to achieve the plan of HDFS-8966



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