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https://issues.apache.org/jira/browse/HADOOP-18177?focusedWorklogId=762237&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-762237
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ASF GitHub Bot logged work on HADOOP-18177:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 26/Apr/22 11:18
            Start Date: 26/Apr/22 11:18
    Worklog Time Spent: 10m 
      Work Description: hadoop-yetus commented on PR #4205:
URL: https://github.com/apache/hadoop/pull/4205#issuecomment-1109670724

   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
   | +0 :ok: |  reexec  |   0m 54s |  |  Docker mode activated.  |
   |||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m  1s |  |  No case conflicting files 
found.  |
   | +0 :ok: |  codespell  |   0m  1s |  |  codespell was not available.  |
   | +0 :ok: |  markdownlint  |   0m  1s |  |  markdownlint was not available.  
|
   | +1 :green_heart: |  @author  |   0m  0s |  |  The patch does not contain 
any @author tags.  |
   |||| _ feature-HADOOP-18028-s3a-prefetch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |  42m 23s |  |  
feature-HADOOP-18028-s3a-prefetch passed  |
   | +1 :green_heart: |  mvnsite  |   0m 53s |  |  
feature-HADOOP-18028-s3a-prefetch passed  |
   | +1 :green_heart: |  shadedclient  |  66m 45s |  |  branch has no errors 
when building and testing our client artifacts.  |
   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   0m 39s |  |  the patch passed  |
   | -1 :x: |  blanks  |   0m  0s | 
[/blanks-eol.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4205/6/artifact/out/blanks-eol.txt)
 |  The patch has 30 line(s) that end in blanks. Use git apply --whitespace=fix 
<<patch_file>>. Refer https://git-scm.com/docs/git-apply  |
   | -1 :x: |  blanks  |   0m  0s | 
[/blanks-tabs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4205/6/artifact/out/blanks-tabs.txt)
 |  The patch 1 line(s) with tabs.  |
   | +1 :green_heart: |  mvnsite  |   0m 40s |  |  the patch passed  |
   | +1 :green_heart: |  shadedclient  |  23m 36s |  |  patch has no errors 
when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | +1 :green_heart: |  asflicense  |   0m 43s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   |  94m 11s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4205/6/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/4205 |
   | Optional Tests | dupname asflicense mvnsite codespell markdownlint |
   | uname | Linux afff6318d18d 4.15.0-175-generic #184-Ubuntu SMP Thu Mar 24 
17:48:36 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | feature-HADOOP-18028-s3a-prefetch / 
125152ef64d24083abb7308978302285c1720fb6 |
   | Max. process+thread count | 589 (vs. ulimit of 5500) |
   | modules | C: hadoop-tools/hadoop-aws U: hadoop-tools/hadoop-aws |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4205/6/console |
   | versions | git=2.25.1 maven=3.6.3 |
   | Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   




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

    Worklog Id:     (was: 762237)
    Time Spent: 2h  (was: 1h 50m)

> document use and architecture design of prefetching s3a input stream
> --------------------------------------------------------------------
>
>                 Key: HADOOP-18177
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18177
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: documentation, fs/s3
>    Affects Versions: 3.4.0
>            Reporter: Steve Loughran
>            Assignee: Ahmar Suhail
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 2h
>  Remaining Estimate: 0h
>
> Document S3PrefetchingInputStream for users  (including any new failure modes 
> in troubleshooting) and the architecture for maintainers
> there's some markdown in 
> hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/read/README.md 
> already



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