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https://issues.apache.org/jira/browse/HDFS-16720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ZanderXu resolved HDFS-16720.
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    Resolution: Invalid

> Import detailed class instead of import * in hadoop-hdfs moulde
> ---------------------------------------------------------------
>
>                 Key: HDFS-16720
>                 URL: https://issues.apache.org/jira/browse/HDFS-16720
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: ZanderXu
>            Assignee: ZanderXu
>            Priority: Major
>              Labels: pull-request-available
>
> During reading code in hadoop-hdfs module, I found that there is import * 
> case in some classes, such asĀ 
> {code:java}
> // BlockPlacementPolicyDefault.java
> import java.util.*;{code}



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