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https://issues.apache.org/jira/browse/HDFS-16558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17651493#comment-17651493
 ] 

ASF GitHub Bot commented on HDFS-16558:
---------------------------------------

hadoop-yetus commented on PR #4230:
URL: https://github.com/apache/hadoop/pull/4230#issuecomment-1363629736

   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
   | +0 :ok: |  reexec  |   1m 10s |  |  Docker mode activated.  |
   |||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m  0s |  |  No case conflicting files 
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|
   | +1 :green_heart: |  @author  |   0m  0s |  |  The patch does not contain 
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   | -1 :x: |  test4tests  |   0m  0s |  |  The patch doesn't appear to include 
any new or modified tests. Please justify why no new tests are needed for this 
patch. Also please list what manual steps were performed to verify this patch.  
|
   |||| _ trunk Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |  39m 13s |  |  trunk passed  |
   | +1 :green_heart: |  compile  |   1m 27s |  |  trunk passed with JDK 
Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04  |
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Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
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   | +1 :green_heart: |  mvnsite  |   1m 33s |  |  trunk passed  |
   | +1 :green_heart: |  javadoc  |   1m  6s |  |  trunk passed with JDK 
Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04  |
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Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
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   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   1m 14s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   1m 17s |  |  the patch passed with JDK 
Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04  |
   | +1 :green_heart: |  javac  |   1m 17s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   1m 15s |  |  the patch passed with JDK 
Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
   | +1 :green_heart: |  javac  |   1m 15s |  |  the patch passed  |
   | +1 :green_heart: |  blanks  |   0m  0s |  |  The patch has no blanks 
issues.  |
   | +1 :green_heart: |  checkstyle  |   0m 52s |  |  the patch passed  |
   | +1 :green_heart: |  mvnsite  |   1m 19s |  |  the patch passed  |
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Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04  |
   | +1 :green_heart: |  javadoc  |   1m 24s |  |  the patch passed with JDK 
Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
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   | +1 :green_heart: |  shadedclient  |  22m 28s |  |  patch has no errors 
when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  | 465m  7s |  |  hadoop-hdfs in the patch 
passed.  |
   | +1 :green_heart: |  asflicense  |   0m 49s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 571m 51s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4230/1/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/4230 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
   | uname | Linux 9e35b4b9d62c 4.15.0-200-generic #211-Ubuntu SMP Thu Nov 24 
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   | Build tool | maven |
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/usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_352-8u352-ga-1~20.04-b08 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4230/1/testReport/ |
   | Max. process+thread count | 2460 (vs. ulimit of 5500) |
   | modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4230/1/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.
   
   




> Consider changing the lock of delegation token from write lock to read lock
> ---------------------------------------------------------------------------
>
>                 Key: HDFS-16558
>                 URL: https://issues.apache.org/jira/browse/HDFS-16558
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Yuanbo Liu
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: image-2022-04-24-14-13-04-695.png, 
> image-2022-04-24-14-13-52-867.png, image-2022-04-24-14-57-18-740.png, 
> image-2022-04-24-14-58-25-294.png
>
>          Time Spent: 1h 50m
>  Remaining Estimate: 0h
>
> In a very busy authed cluster, renewing/caneling/getting delegation token get 
> slow and it will slow down the speed of handling rpcs from client. Since 
> AbstractDelegationTokenSecretManager is a thread-safe manager, we propose to 
> change the fs lock from write lock to read lock(protect editlog rolling)
> !image-2022-04-24-14-58-25-294.png|width=318,height=194!
> !image-2022-04-24-14-13-52-867.png|width=324,height=173!
> !image-2022-04-24-14-57-18-740.png|width=303,height=184!



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