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https://issues.apache.org/jira/browse/HDFS-16718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17576151#comment-17576151
 ] 

ASF GitHub Bot commented on HDFS-16718:
---------------------------------------

hadoop-yetus commented on PR #4708:
URL: https://github.com/apache/hadoop/pull/4708#issuecomment-1207166715

   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
   | +0 :ok: |  reexec  |   0m 48s |  |  Docker mode activated.  |
   |||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m  0s |  |  No case conflicting files 
found.  |
   | +0 :ok: |  codespell  |   0m  0s |  |  codespell was not available.  |
   | +0 :ok: |  detsecrets  |   0m  0s |  |  detect-secrets was not available.  
|
   | +1 :green_heart: |  @author  |   0m  0s |  |  The patch does not contain 
any @author tags.  |
   | -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  |  40m 58s |  |  trunk passed  |
   | +1 :green_heart: |  compile  |   1m 43s |  |  trunk passed with JDK 
Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1  |
   | +1 :green_heart: |  compile  |   1m 31s |  |  trunk passed with JDK 
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07  |
   | +1 :green_heart: |  checkstyle  |   1m 23s |  |  trunk passed  |
   | +1 :green_heart: |  mvnsite  |   1m 42s |  |  trunk passed  |
   | +1 :green_heart: |  javadoc  |   1m 21s |  |  trunk passed with JDK 
Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1  |
   | +1 :green_heart: |  javadoc  |   1m 38s |  |  trunk passed with JDK 
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07  |
   | +1 :green_heart: |  spotbugs  |   3m 49s |  |  trunk passed  |
   | +1 :green_heart: |  shadedclient  |  26m 20s |  |  branch has no errors 
when building and testing our client artifacts.  |
   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   1m 23s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   1m 29s |  |  the patch passed with JDK 
Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1  |
   | -1 :x: |  javac  |   1m 29s | 
[/results-compile-javac-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-11.0.15+10-Ubuntu-0ubuntu0.20.04.1.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4708/2/artifact/out/results-compile-javac-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-11.0.15+10-Ubuntu-0ubuntu0.20.04.1.txt)
 |  
hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
 with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 generated 6 new + 
905 unchanged - 6 fixed = 911 total (was 911)  |
   | +1 :green_heart: |  compile  |   1m 19s |  |  the patch passed with JDK 
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07  |
   | -1 :x: |  javac  |   1m 19s | 
[/results-compile-javac-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4708/2/artifact/out/results-compile-javac-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07.txt)
 |  
hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
 with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 generated 6 new 
+ 884 unchanged - 6 fixed = 890 total (was 890)  |
   | +1 :green_heart: |  blanks  |   0m  0s |  |  The patch has no blanks 
issues.  |
   | -0 :warning: |  checkstyle  |   1m  3s | 
[/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4708/2/artifact/out/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt)
 |  hadoop-hdfs-project/hadoop-hdfs: The patch generated 1 new + 199 unchanged 
- 1 fixed = 200 total (was 200)  |
   | +1 :green_heart: |  mvnsite  |   1m 28s |  |  the patch passed  |
   | +1 :green_heart: |  javadoc  |   0m 58s |  |  the patch passed with JDK 
Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1  |
   | +1 :green_heart: |  javadoc  |   1m 29s |  |  the patch passed with JDK 
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07  |
   | +1 :green_heart: |  spotbugs  |   3m 34s |  |  the patch passed  |
   | +1 :green_heart: |  shadedclient  |  26m 16s |  |  patch has no errors 
when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  | 341m 28s |  |  hadoop-hdfs in the patch 
passed.  |
   | +1 :green_heart: |  asflicense  |   0m 58s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 459m 54s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4708/2/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/4708 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
   | uname | Linux 5d2ceee01ff1 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 | trunk / 454522ffa9adaa5611387b03c2c0a1bf359d7c6d |
   | Default Java | Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
   | Multi-JDK versions | /usr/lib/jvm/java-11-openjdk-amd64:Private 
Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 
/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4708/2/testReport/ |
   | Max. process+thread count | 1948 (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-4708/2/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.
   
   




> Improve Code with Lambda in org.apahce.hadoop.hdfs.server.datanode packages
> ---------------------------------------------------------------------------
>
>                 Key: HDFS-16718
>                 URL: https://issues.apache.org/jira/browse/HDFS-16718
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: ZanderXu
>            Assignee: ZanderXu
>            Priority: Major
>              Labels: pull-request-available
>
> Improve Code with Lambda in org.apahce.hadoop.hdfs.server.datanode packages.
> For example:
> Current logic:
> {code:java}
> synchronized void startAll() throws IOException {
>   try {
>     UserGroupInformation.getLoginUser().doAs(
>         new PrivilegedExceptionAction<Object>() {
>           @Override
>           public Object run() throws Exception {
>             for (BPOfferService bpos : offerServices) {
>               bpos.start();
>             }
>             return null;
>           }
>         });
>   } catch (InterruptedException ex) {
>     IOException ioe = new IOException();
>     ioe.initCause(ex.getCause());
>     throw ioe;
>   }
> }{code}
> Improved Code with Lambda:
> {code:java}
> synchronized void startAll() throws IOException {
>   try {
>     UserGroupInformation.getLoginUser().doAs(
>         (PrivilegedExceptionAction<Object>) () -> {
>           for (BPOfferService bpos : offerServices) {
>             bpos.start();
>           }
>           return null;
>         });
>   } catch (InterruptedException ex) {
>     IOException ioe = new IOException();
>     ioe.initCause(ex.getCause());
>     throw ioe;
>   }
> }{code}
>  



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