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https://issues.apache.org/jira/browse/HADOOP-18426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17599197#comment-17599197
]
ASF GitHub Bot commented on HADOOP-18426:
-----------------------------------------
hadoop-yetus commented on PR #4844:
URL: https://github.com/apache/hadoop/pull/4844#issuecomment-1234923892
:confetti_ball: **+1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 0m 50s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
found. |
| +0 :ok: | codespell | 0m 1s | | codespell was not available. |
| +0 :ok: | detsecrets | 0m 1s | | detect-secrets was not available.
|
| +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 1 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 41m 47s | | trunk passed |
| +1 :green_heart: | compile | 25m 9s | | trunk passed with JDK
Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 |
| +1 :green_heart: | compile | 21m 52s | | trunk passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| +1 :green_heart: | checkstyle | 1m 25s | | trunk passed |
| +1 :green_heart: | mvnsite | 1m 52s | | trunk passed |
| +1 :green_heart: | javadoc | 1m 25s | | trunk passed with JDK
Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 |
| +1 :green_heart: | javadoc | 0m 59s | | trunk passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| +1 :green_heart: | spotbugs | 2m 59s | | trunk passed |
| +1 :green_heart: | shadedclient | 26m 3s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 1m 5s | | the patch passed |
| +1 :green_heart: | compile | 24m 35s | | the patch passed with JDK
Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 |
| +1 :green_heart: | javac | 24m 35s | | the patch passed |
| +1 :green_heart: | compile | 21m 53s | | the patch passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| +1 :green_heart: | javac | 21m 53s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| +1 :green_heart: | checkstyle | 1m 16s | |
hadoop-common-project/hadoop-common: The patch generated 0 new + 13 unchanged -
12 fixed = 13 total (was 25) |
| +1 :green_heart: | mvnsite | 1m 49s | | the patch passed |
| +1 :green_heart: | javadoc | 1m 16s | | the patch passed with JDK
Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 |
| +1 :green_heart: | javadoc | 0m 57s | | the patch passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| +1 :green_heart: | spotbugs | 2m 59s | | the patch passed |
| +1 :green_heart: | shadedclient | 26m 0s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 18m 35s | | hadoop-common in the patch
passed. |
| +1 :green_heart: | asflicense | 1m 9s | | The patch does not
generate ASF License warnings. |
| | | 225m 59s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4844/2/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/4844 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
| uname | Linux e68a5d240c17 4.15.0-191-generic #202-Ubuntu SMP Thu Aug 4
01:49:29 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 25396980866eef037375c7df59010b599798812f |
| 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-4844/2/testReport/ |
| Max. process+thread count | 2801 (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-4844/2/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 the accuracy of MutableStat mean
> ----------------------------------------
>
> Key: HADOOP-18426
> URL: https://issues.apache.org/jira/browse/HADOOP-18426
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Shuyan Zhang
> Assignee: Shuyan Zhang
> Priority: Major
> Labels: pull-request-available
>
> The current MutableStat mean calculation method is more prone to loss
> accuracy because the sum of samples is too large.
> Storing large integers in the double type results in a loss of accuracy. For
> example, 9223372036854775707 and 9223372036854775708 are both stored as
> doubles as 9223372036854776000. Therefore, we should try to avoid using the
> cumulative total sum method to calculate the average, but update the average
> every time we sample. All in all, we can process each sample on its own to
> improve mean accuracy.
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