[ 
https://issues.apache.org/jira/browse/HADOOP-16202?focusedWorklogId=479567&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-479567
 ]

ASF GitHub Bot logged work on HADOOP-16202:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 07/Sep/20 10:23
            Start Date: 07/Sep/20 10:23
    Worklog Time Spent: 10m 
      Work Description: steveloughran commented on pull request #2168:
URL: https://github.com/apache/hadoop/pull/2168#issuecomment-688229627


   ```
   
./hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/OpenFileOptions.java:31:@InterfaceAudience.Public:1:
 Utility classes should not have a public or default constructor. 
[HideUtilityClassConstructor]
   
./hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/OpenFileParameters.java:22:import
 java.util.stream.Collectors;:8: Unused import - java.util.stream.Collectors. 
[UnusedImports]
   
./hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/OpenFileParameters.java:23:import
 java.util.stream.Stream;:8: Unused import - java.util.stream.Stream. 
[UnusedImports]
   
./hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/S3AOpenFileOperation.java:52:
  public class S3AOpenFileOperation extends AbstractStoreOperation {: 'class 
def modifier' has incorrect indentation level 2, expected level should be 0. 
[Indentation]
   
./hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/S3AOpenFileOperation.java:106:
    /** SQL string if this is a SQL select file*/: First sentence should end 
with a period. [JavadocStyle]
   
./hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/S3AOpenFileOperation.java:280:
  /**: First sentence should end with a period. [JavadocStyle]
   
./hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/impl/TestOpenFileHelper.java:215:
  /**: First sentence should end with a period. [JavadocStyle]
   
./hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3AOpenCost.java:169:
          byte[] out = new byte[(int) longLen];: 'block' child has incorrect 
indentation level 10, expected level should be 6. [Indentation]
   
./hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3AOpenCost.java:170:
          intercept(EOFException.class,: 'block' child has incorrect 
indentation level 10, expected level should be 6. [Indentation]
   
./hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3AOpenCost.java:172:
          in3.seek(longLen - 1);: 'block' child has incorrect indentation level 
10, expected level should be 6. [Indentation]
   
./hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3AOpenCost.java:173:
          assertEquals("read past real EOF on " + in3,: 'block' child has 
incorrect indentation level 10, expected level should be 6. [Indentation]
   
./hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3AOpenCost.java:175:
          in3.close();: 'block' child has incorrect indentation level 10, 
expected level should be 6. [Indentation]
   
./hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3AOpenCost.java:176:
          return null;: 'block' child has incorrect indentation level 10, 
expected level should be 6. [Indentation]
   
./hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3AOpenCost.java:177:
        },: 'block rcurly' has incorrect indentation level 8, expected level 
should be 4. [Indentation]
   ```


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 479567)
    Time Spent: 50m  (was: 40m)

> Enhance S3A openFile()
> ----------------------
>
>                 Key: HADOOP-16202
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16202
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.3.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> The {{openFile()}} builder API lets us add new options when reading a file
> Add an option {{"fs.s3a.open.option.length"}} which takes a long and allows 
> the length of the file to be declared. If set, *no check for the existence of 
> the file is issued when opening the file*
> Also: withFileStatus() to take any FileStatus implementation, rather than 
> only S3AFileStatus -and not check that the path matches the path being 
> opened. Needed to support viewFS-style wrapping and mounting.



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