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https://issues.apache.org/jira/browse/HADOOP-19120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17832820#comment-17832820
 ] 

ASF GitHub Bot commented on HADOOP-19120:
-----------------------------------------

hadoop-yetus commented on PR #6633:
URL: https://github.com/apache/hadoop/pull/6633#issuecomment-2029626654

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |:----:|----------:|--------:|:--------:|:-------:|
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   |||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m  2s |  |  No case conflicting files 
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|
   | +1 :green_heart: |  @author  |   0m  0s |  |  The patch does not contain 
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   | +1 :green_heart: |  test4tests  |   0m  0s |  |  The patch appears to 
include 22 new or modified test files.  |
   |||| _ trunk Compile Tests _ |
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   | +1 :green_heart: |  compile  |   0m 36s |  |  trunk passed with JDK 
Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1  |
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Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1  |
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Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06  |
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   | +1 :green_heart: |  shadedclient  |  33m 49s |  |  branch has no errors 
when building and testing our client artifacts.  |
   | -0 :warning: |  patch  |  34m  9s |  |  Used diff version of patch file. 
Binary files and potentially other changes not applied. Please rebase and 
squash commits if necessary.  |
   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   0m 30s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   0m 31s |  |  the patch passed with JDK 
Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1  |
   | +1 :green_heart: |  javac  |   0m 31s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   0m 28s |  |  the patch passed with JDK 
Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06  |
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issues.  |
   | -0 :warning: |  checkstyle  |   0m 20s | 
[/results-checkstyle-hadoop-tools_hadoop-azure.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6633/32/artifact/out/results-checkstyle-hadoop-tools_hadoop-azure.txt)
 |  hadoop-tools/hadoop-azure: The patch generated 9 new + 18 unchanged - 0 
fixed = 27 total (was 18)  |
   | +1 :green_heart: |  mvnsite  |   0m 31s |  |  the patch passed  |
   | +1 :green_heart: |  javadoc  |   0m 26s |  |  the patch passed with JDK 
Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1  |
   | +1 :green_heart: |  javadoc  |   0m 25s |  |  the patch passed with JDK 
Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06  |
   | -1 :x: |  spotbugs  |   1m 11s | 
[/new-spotbugs-hadoop-tools_hadoop-azure.html](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6633/32/artifact/out/new-spotbugs-hadoop-tools_hadoop-azure.html)
 |  hadoop-tools/hadoop-azure generated 1 new + 0 unchanged - 0 fixed = 1 total 
(was 0)  |
   | +1 :green_heart: |  shadedclient  |  33m 54s |  |  patch has no errors 
when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |   2m 26s |  |  hadoop-azure in the patch 
passed.  |
   | +1 :green_heart: |  asflicense  |   0m 38s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 129m 26s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | SpotBugs | module:hadoop-tools/hadoop-azure |
   |  |  Class org.apache.hadoop.fs.azurebfs.services.kac.KeepAliveCache 
defines non-transient non-serializable instance field keepAliveTimer  In 
KeepAliveCache.java:instance field keepAliveTimer  In KeepAliveCache.java |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.45 ServerAPI=1.45 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6633/32/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/6633 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
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   | uname | Linux db108a5c7cd7 5.15.0-94-generic #104-Ubuntu SMP Tue Jan 9 
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   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | trunk / 9b98a13b526a1f741e2359ee9167949468aeec67 |
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/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6633/32/testReport/ |
   | Max. process+thread count | 552 (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-6633/32/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]: ApacheHttpClient adaptation as network library
> ------------------------------------------------------
>
>                 Key: HADOOP-19120
>                 URL: https://issues.apache.org/jira/browse/HADOOP-19120
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/azure
>    Affects Versions: 3.5.0
>            Reporter: Pranav Saxena
>            Assignee: Pranav Saxena
>            Priority: Major
>              Labels: pull-request-available
>
> Apache HttpClient is more feature-rich and flexible and gives application 
> more granular control over networking parameter.
> ABFS currently relies on the JDK-net library. This library is managed by 
> OpenJDK and has no performance problem. However, it limits the application's 
> control over networking, and there are very few APIs and hooks exposed that 
> the application can use to get metrics, choose which and when a connection 
> should be reused. ApacheHttpClient will give important hooks to fetch 
> important metrics and control networking parameters.
> A custom implementation of connection-pool is used. The implementation is 
> adapted from the JDK8 connection pooling. Reasons for doing it:
> 1. PoolingHttpClientConnectionManager heuristic caches all the reusable 
> connections it has created. JDK's implementation only caches limited number 
> of connections. The limit is given by JVM system property 
> "http.maxConnections". If there is no system-property, it defaults to 5. 
> Connection-establishment latency increased with all the connections were 
> cached. Hence, adapting the pooling heuristic of JDK netlib,
> 2. In PoolingHttpClientConnectionManager, it expects the application to 
> provide `setMaxPerRoute` and `setMaxTotal`, which the implementation uses as 
> the total number of connections it can create. For application using ABFS, it 
> is not feasible to provide a value in the initialisation of the 
> connectionManager. JDK's implementation has no cap on the number of 
> connections it can have opened on a moment. Hence, adapting the pooling 
> heuristic of JDK netlib,



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