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https://issues.apache.org/jira/browse/HADOOP-18146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17649825#comment-17649825
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ASF GitHub Bot commented on HADOOP-18146:
-----------------------------------------

hadoop-yetus commented on PR #4039:
URL: https://github.com/apache/hadoop/pull/4039#issuecomment-1359544857

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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|
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   |||| _ trunk Compile Tests _ |
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[/branch-javadoc-hadoop-tools_hadoop-azure-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4039/31/artifact/out/branch-javadoc-hadoop-tools_hadoop-azure-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt)
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when building and testing our client artifacts.  |
   | -0 :warning: |  patch  |  24m 28s |  |  Used diff version of patch file. 
Binary files and potentially other changes not applied. Please rebase and 
squash commits if necessary.  |
   |||| _ Patch Compile Tests _ |
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   | +1 :green_heart: |  compile  |   0m 35s |  |  the patch passed with JDK 
Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04  |
   | -1 :x: |  javac  |   0m 35s | 
[/results-compile-javac-hadoop-tools_hadoop-azure-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4039/31/artifact/out/results-compile-javac-hadoop-tools_hadoop-azure-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt)
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Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
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[/results-compile-javac-hadoop-tools_hadoop-azure-jdkPrivateBuild-1.8.0_352-8u352-ga-1~20.04-b08.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4039/31/artifact/out/results-compile-javac-hadoop-tools_hadoop-azure-jdkPrivateBuild-1.8.0_352-8u352-ga-1~20.04-b08.txt)
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[/results-checkstyle-hadoop-tools_hadoop-azure.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4039/31/artifact/out/results-checkstyle-hadoop-tools_hadoop-azure.txt)
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   | -1 :x: |  javadoc  |   0m 27s | 
[/patch-javadoc-hadoop-tools_hadoop-azure-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4039/31/artifact/out/patch-javadoc-hadoop-tools_hadoop-azure-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt)
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Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
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   | +1 :green_heart: |  shadedclient  |  23m 43s |  |  patch has no errors 
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   |||| _ Other Tests _ |
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   |  |   | 103m 50s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4039/31/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/4039 |
   | JIRA Issue | HADOOP-18146 |
   | Optional Tests | dupname asflicense codespell detsecrets xmllint compile 
javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle 
markdownlint |
   | uname | Linux 37e1b80d7600 4.15.0-200-generic #211-Ubuntu SMP Thu Nov 24 
18:16:04 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | trunk / 36ec26094831fd3d32876e71781449c2485f333b |
   | Default Java | Private Build-1.8.0_352-8u352-ga-1~20.04-b08 |
   | Multi-JDK versions | 
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   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4039/31/testReport/ |
   | Max. process+thread count | 534 (vs. ulimit of 5500) |
   | modules | C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4039/31/console |
   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   




> ABFS: Add changes for expect hundred continue header with append requests
> -------------------------------------------------------------------------
>
>                 Key: HADOOP-18146
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18146
>             Project: Hadoop Common
>          Issue Type: Sub-task
>    Affects Versions: 3.3.1
>            Reporter: Anmol Asrani
>            Assignee: Anmol Asrani
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 2h 10m
>  Remaining Estimate: 0h
>
>  Heavy load from a Hadoop cluster lead to high resource utilization at FE 
> nodes. Investigations from the server side indicate payload buffering at 
> Http.Sys as the cause. Payload of requests that eventually fail due to 
> throttling limits are also getting buffered, as its triggered before FE could 
> start request processing.
> Approach: Client sends Append Http request with Expect header, but holds back 
> on payload transmission until server replies back with HTTP 100. We add this 
> header for all append requests so as to reduce.
> We made several workload runs with and without hundred continue enabled and 
> the overall observation is that :-
>  # The ratio of TCP SYN packet count with and without expect hundred continue 
> enabled is 0.32 : 3 on average.
>  #  The ingress into the machine at TCP level is almost 3 times lesser with 
> hundred continue enabled which implies a lot of bandwidth save.



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