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https://issues.apache.org/jira/browse/HADOOP-17028?focusedWorklogId=625567&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-625567
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ASF GitHub Bot logged work on HADOOP-17028:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 20/Jul/21 12:27
            Start Date: 20/Jul/21 12:27
    Worklog Time Spent: 10m 
      Work Description: hadoop-yetus commented on pull request #3218:
URL: https://github.com/apache/hadoop/pull/3218#issuecomment-883349836


   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime | Comment |
   |:----:|----------:|--------:|:--------|
   | +0 :ok: |  reexec  |   0m 46s |  Docker mode activated.  |
   ||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m  0s |  No case conflicting files 
found.  |
   | +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 
4 new or modified test files.  |
   ||| _ branch-2.10 Compile Tests _ |
   | +0 :ok: |  mvndep  |   2m  9s |  Maven dependency ordering for branch  |
   | +1 :green_heart: |  mvninstall  |  12m 10s |  branch-2.10 passed  |
   | +1 :green_heart: |  compile  |  13m 13s |  branch-2.10 passed with JDK 
Azul Systems, Inc.-1.7.0_262-b10  |
   | +1 :green_heart: |  compile  |  10m 44s |  branch-2.10 passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~16.04.1-b10  |
   | +1 :green_heart: |  checkstyle  |   2m  1s |  branch-2.10 passed  |
   | +1 :green_heart: |  mvnsite  |   2m 30s |  branch-2.10 passed  |
   | +1 :green_heart: |  javadoc  |   2m 42s |  branch-2.10 passed with JDK 
Azul Systems, Inc.-1.7.0_262-b10  |
   | +1 :green_heart: |  javadoc  |   2m  7s |  branch-2.10 passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~16.04.1-b10  |
   | +0 :ok: |  spotbugs  |  15m  8s |  Both FindBugs and SpotBugs are enabled, 
using SpotBugs.  |
   | -1 :x: |  spotbugs  |   2m  3s |  hadoop-common-project/hadoop-common in 
branch-2.10 has 2 extant spotbugs warnings.  |
   | -1 :x: |  spotbugs  |   2m 30s |  hadoop-hdfs-project/hadoop-hdfs in 
branch-2.10 has 1 extant spotbugs warnings.  |
   ||| _ Patch Compile Tests _ |
   | +0 :ok: |  mvndep  |   0m 21s |  Maven dependency ordering for patch  |
   | +1 :green_heart: |  mvninstall  |   1m 36s |  the patch passed  |
   | +1 :green_heart: |  compile  |  12m 31s |  the patch passed with JDK Azul 
Systems, Inc.-1.7.0_262-b10  |
   | +1 :green_heart: |  javac  |  12m 31s |  the patch passed  |
   | +1 :green_heart: |  compile  |  10m 41s |  the patch passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~16.04.1-b10  |
   | +1 :green_heart: |  javac  |  10m 41s |  the patch passed  |
   | +1 :green_heart: |  checkstyle  |   1m 56s |  root: The patch generated 0 
new + 218 unchanged - 6 fixed = 218 total (was 224)  |
   | +1 :green_heart: |  mvnsite  |   2m 28s |  the patch passed  |
   | +1 :green_heart: |  whitespace  |   0m  0s |  The patch has no whitespace 
issues.  |
   | +1 :green_heart: |  javadoc  |   2m 36s |  the patch passed with JDK Azul 
Systems, Inc.-1.7.0_262-b10  |
   | +1 :green_heart: |  javadoc  |   2m  1s |  the patch passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~16.04.1-b10  |
   | +1 :green_heart: |  spotbugs  |   4m 58s |  the patch passed  |
   ||| _ Other Tests _ |
   | -1 :x: |  unit  |   8m 10s |  hadoop-common in the patch failed.  |
   | -1 :x: |  unit  |  62m 53s |  hadoop-hdfs in the patch failed.  |
   | +1 :green_heart: |  asflicense  |   0m 56s |  The patch does not generate 
ASF License warnings.  |
   |  |   | 171m 25s |   |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | hadoop.log.TestLogLevel |
   |   | hadoop.hdfs.qjournal.server.TestJournalNodeRespectsBindHostKeys |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3218/1/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/3218 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
mvnsite unit shadedclient spotbugs checkstyle |
   | uname | Linux e82c3bca9d52 4.15.0-60-generic #67-Ubuntu SMP Thu Aug 22 
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   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | branch-2.10 / 39c8297 |
   | Default Java | Private Build-1.8.0_292-8u292-b10-0ubuntu1~16.04.1-b10 |
   | Multi-JDK versions | /usr/lib/jvm/zulu-7-amd64:Azul Systems, 
Inc.-1.7.0_262-b10 /usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_292-8u292-b10-0ubuntu1~16.04.1-b10 |
   | spotbugs | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3218/1/artifact/out/branch-spotbugs-hadoop-common-project_hadoop-common-warnings.html
 |
   | spotbugs | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3218/1/artifact/out/branch-spotbugs-hadoop-hdfs-project_hadoop-hdfs-warnings.html
 |
   | unit | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3218/1/artifact/out/patch-unit-hadoop-common-project_hadoop-common.txt
 |
   | unit | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3218/1/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3218/1/testReport/ |
   | Max. process+thread count | 2620 (vs. ulimit of 5500) |
   | modules | C: hadoop-common-project/hadoop-common 
hadoop-hdfs-project/hadoop-hdfs U: . |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3218/1/console |
   | versions | git=2.7.4 maven=3.3.9 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.12.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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

    Worklog Id:     (was: 625567)
    Time Spent: 7h 40m  (was: 7.5h)

> ViewFS should initialize target filesystems lazily
> --------------------------------------------------
>
>                 Key: HADOOP-17028
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17028
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: client-mounts, fs, viewfs
>    Affects Versions: 3.2.1
>            Reporter: Uma Maheswara Rao G
>            Assignee: Abhishek Das
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 7h 40m
>  Remaining Estimate: 0h
>
> Currently viewFS initialize all configured target filesystems when 
> viewfs#init itself.
> Some target file system initialization involve creating heavy objects and 
> proxy connections. Ex: DistributedFileSystem#initialize will create DFSClient 
> object which will create proxy connections to NN etc.
> For example: if ViewFS configured with 10 target fs with hdfs uri and 2 
> targets with s3a.
> If one of the client only work with s3a target, But ViewFS will initialize 
> all targets irrespective of what clients interested to work with. That means, 
> here client will create 10 DFS initializations and 2 s3a initializations. Its 
> unnecessary to have DFS initialization here. So, it will be a good idea to 
> initialize the target fs only when first time usage call come to particular 
> target fs scheme. 



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