skysiders opened a new pull request, #4629:
URL: https://github.com/apache/hadoop/pull/4629

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   ### Description of PR
   YARN-11231 FSDownload calls createDir in the call method to create the 
destinationTmp directory, which is later used as the parent directory to create 
the directory dFinal, which is used in doAs to perform operations such as path 
creation and path traversal. doAs cannot determine the user's identity, so 
there is a problem with setting 755 permissions for destinationTmp here, I 
think it should be set to 777 permissions here.
   
   ### How was this patch tested?
   
   
   ### For code changes:
   
   - [x] 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?
   
   


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