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https://issues.apache.org/jira/browse/HADOOP-17126?focusedWorklogId=510463&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-510463
 ]

ASF GitHub Bot logged work on HADOOP-17126:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 11/Nov/20 21:11
            Start Date: 11/Nov/20 21:11
    Worklog Time Spent: 10m 
      Work Description: hadoop-yetus commented on pull request #2143:
URL: https://github.com/apache/hadoop/pull/2143#issuecomment-725663643


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |||| _ Prechecks _ |
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any @author tags.  |
   | +1 :green_heart: |   |   0m  0s | [test4tests](test4tests) |  The patch 
appears to include 1 new or modified test files.  |
   |||| _ trunk Compile Tests _ |
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considering switching to SpotBugs.  |
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   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   1m  2s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |  24m 41s |  |  the patch passed with JDK 
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[/patch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.9+11-Ubuntu-0ubuntu1.18.04.1.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2143/6/artifact/out/patch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.9+11-Ubuntu-0ubuntu1.18.04.1.txt)
 |  hadoop-common in the patch failed with JDK 
Ubuntu-11.0.9+11-Ubuntu-0ubuntu1.18.04.1.  |
   | +1 :green_heart: |  javadoc  |   1m 46s |  |  the patch passed with JDK 
Private Build-1.8.0_272-8u272-b10-0ubuntu1~18.04-b10  |
   | +1 :green_heart: |  findbugs  |   2m 51s |  |  the patch passed  |
   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |  10m 39s |  |  hadoop-common in the patch 
passed.  |
   | +1 :green_heart: |  asflicense  |   0m 55s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 192m 32s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.40 ServerAPI=1.40 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2143/6/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/2143 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
mvnsite unit shadedclient findbugs checkstyle |
   | uname | Linux 467ec93bb0b9 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 
11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | trunk / 188ebb5a9bb |
   | Default Java | Private Build-1.8.0_272-8u272-b10-0ubuntu1~18.04-b10 |
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/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_272-8u272-b10-0ubuntu1~18.04-b10 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2143/6/testReport/ |
   | Max. process+thread count | 3249 (vs. ulimit of 5500) |
   | modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2143/6/console |
   | versions | git=2.17.1 maven=3.6.0 findbugs=4.1.3 |
   | Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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

            Worklog Id:     (was: 510463)
    Remaining Estimate: 0h
            Time Spent: 10m

> implement non-guava Precondition checkNotNull
> ---------------------------------------------
>
>                 Key: HADOOP-17126
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17126
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Ahmed Hussein
>            Assignee: Ahmed Hussein
>            Priority: Major
>         Attachments: HADOOP-17126.001.patch, HADOOP-17126.002.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> As part In order to replace Guava Preconditions, we need to implement our own 
> versions of the API.
>  This Jira is to create {{checkNotNull}} in a new package dubbed {{unguava}}.
>  +The plan is as follows+
>  * create a new {{package org.apache.hadoop.util.unguava;}}
>  * {{create class Validate}}
>  * implement  {{package org.apache.hadoop.util.unguava.Validate;}} with the 
> following interface
>  ** {{checkNotNull(final T obj)}}
>  ** {{checkNotNull(final T reference, final Object errorMessage)}}
>  ** {{checkNotNull(final T obj, final String message, final Object... 
> values)}}
>  ** {{checkNotNull(final T obj,final Supplier<String> msgSupplier)}}
>  * {{guava.preconditions used String.lenientformat which suppressed 
> exceptions caused by string formatting of the exception message . So, in 
> order to avoid changing the behavior, the implementation catches Exceptions 
> triggered by building the message (IllegalFormat, InsufficientArg, 
> NullPointer..etc)}}
>  * {{After merging the new class, we can replace 
> guava.Preconditions.checkNotNull by {{unguava.Validate.checkNotNull}}}}
>  * We need the change to go into trunk, 3.1, 3.2, and 3.3
>  
> Similar Jiras will be created to implement checkState, checkArgument, 
> checkIndex



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