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https://issues.apache.org/jira/browse/HADOOP-17833?focusedWorklogId=640362&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-640362
 ]

ASF GitHub Bot logged work on HADOOP-17833:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 20/Aug/21 19:40
            Start Date: 20/Aug/21 19:40
    Worklog Time Spent: 10m 
      Work Description: hadoop-yetus commented on pull request #3289:
URL: https://github.com/apache/hadoop/pull/3289#issuecomment-902915052


   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
   | +0 :ok: |  reexec  |   1m  4s |  |  Docker mode activated.  |
   |||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m  1s |  |  No case conflicting files 
found.  |
   | +0 :ok: |  codespell  |   0m  1s |  |  codespell was not available.  |
   | +1 :green_heart: |  @author  |   0m  0s |  |  The patch does not contain 
any @author tags.  |
   | +1 :green_heart: |  test4tests  |   0m  0s |  |  The patch appears to 
include 18 new or modified test files.  |
   |||| _ trunk Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |  31m 19s |  |  trunk passed  |
   | +1 :green_heart: |  compile  |   0m 47s |  |  trunk passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04  |
   | +1 :green_heart: |  compile  |   0m 40s |  |  trunk passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10  |
   | +1 :green_heart: |  checkstyle  |   0m 32s |  |  trunk passed  |
   | +1 :green_heart: |  mvnsite  |   0m 47s |  |  trunk passed  |
   | +1 :green_heart: |  javadoc  |   0m 27s |  |  trunk passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04  |
   | +1 :green_heart: |  javadoc  |   0m 36s |  |  trunk passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10  |
   | +1 :green_heart: |  spotbugs  |   1m 10s |  |  trunk passed  |
   | +1 :green_heart: |  shadedclient  |  14m 20s |  |  branch has no errors 
when building and testing our client artifacts.  |
   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   0m 37s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   0m 38s |  |  the patch passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04  |
   | +1 :green_heart: |  javac  |   0m 38s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   0m 31s |  |  the patch passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10  |
   | +1 :green_heart: |  javac  |   0m 31s |  |  the patch passed  |
   | +1 :green_heart: |  blanks  |   0m  0s |  |  The patch has no blanks 
issues.  |
   | -0 :warning: |  checkstyle  |   0m 21s | 
[/results-checkstyle-hadoop-tools_hadoop-aws.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3289/3/artifact/out/results-checkstyle-hadoop-tools_hadoop-aws.txt)
 |  hadoop-tools/hadoop-aws: The patch generated 13 new + 25 unchanged - 1 
fixed = 38 total (was 26)  |
   | +1 :green_heart: |  mvnsite  |   0m 35s |  |  the patch passed  |
   | +1 :green_heart: |  javadoc  |   0m 16s |  |  the patch passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04  |
   | +1 :green_heart: |  javadoc  |   0m 26s |  |  the patch passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10  |
   | +1 :green_heart: |  spotbugs  |   1m 11s |  |  the patch passed  |
   | +1 :green_heart: |  shadedclient  |  14m 15s |  |  patch has no errors 
when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | -1 :x: |  unit  |   2m 43s | 
[/patch-unit-hadoop-tools_hadoop-aws.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3289/3/artifact/out/patch-unit-hadoop-tools_hadoop-aws.txt)
 |  hadoop-aws in the patch passed.  |
   | +1 :green_heart: |  asflicense  |   0m 34s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   |  75m  5s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | 
hadoop.fs.s3a.commit.staging.TestDirectoryCommitterScale |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3289/3/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/3289 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
mvnsite unit shadedclient spotbugs checkstyle codespell |
   | uname | Linux 5ca76b4e62d8 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | trunk / d6a0dcf41e78bf5b8155d0f49d0aec66224168fa |
   | Default Java | Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
   | Multi-JDK versions | 
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 
/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3289/3/testReport/ |
   | Max. process+thread count | 698 (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-3289/3/console |
   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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

    Worklog Id:     (was: 640362)
    Time Spent: 1h 10m  (was: 1h)

> Improve Magic Committer Performane
> ----------------------------------
>
>                 Key: HADOOP-17833
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17833
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs/s3
>    Affects Versions: 3.3.1
>            Reporter: Steve Loughran
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> Magic committer tasks can be slow because every file created with 
> overwrite=false triggers a HEAD (verify there's no file) and a LIST (that 
> there's no dir). And because of delayed manifestations, it may not behave as 
> expected.
> ParquetOutputFormat is one example of a library which does this.
> we could fix parquet to use overwrite=true, but (a) there may be surprises in 
> other uses (b) it'd still leave the list and (c) do nothing for other formats 
> call
> Proposed: createFile() under a magic path to skip all probes for file/dir at 
> end of path
> Only a single task attempt Will be writing to that directory and it should 
> know what it is doing. If there is conflicting file names and parts across 
> tasks that won't even get picked up at this point. Oh and none of the 
> committers ever check for this: you'll get the last file manifested (s3a) or 
> renamed (file)
> If we skip the checks we will save 2 HTTP requests/file.



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