[jira] [Commented] (HADOOP-19346) ViewFileSystem.InnerCache: Replaced ReentrantReadWriteLock with ConcurrentHashMap/putIfAbsent()

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-19346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17901087#comment-17901087 ] 

ASF GitHub Bot commented on HADOOP-19346:
-----------------------------------------

xinglin opened a new pull request, #7187:
URL: https://github.com/apache/hadoop/pull/7187

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   ### Description of PR
   HADOOP-19346. ViewFileSystem.InnerCache: Replaced ReentrantReadWriteLock with ConcurrentHashMap/putIfAbsent()
   
   ### How was this patch tested?
   
   mvn package -Pdist -PskipTests
   
   ### For code changes:
   
   - [ ] Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
   - [ ] Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
   - [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under [ASF 2.0](http://www.apache.org/legal/resolved.html#category-a)?
   - [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`, `NOTICE-binary` files?
   
   




> ViewFileSystem.InnerCache: Replaced ReentrantReadWriteLock with ConcurrentHashMap/putIfAbsent()
> -----------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-19346
>                 URL: https://issues.apache.org/jira/browse/HADOOP-19346
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: common
>            Reporter: Xing Lin
>            Assignee: Xing Lin
>            Priority: Minor
>
> Use of ReentrantReadWriteLock  + Map can be replaced/simplified with a ConcurrentHashMap. 



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