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https://issues.apache.org/jira/browse/HADOOP-17408?focusedWorklogId=520379&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-520379
]
ASF GitHub Bot logged work on HADOOP-17408:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 04/Dec/20 23:59
Start Date: 04/Dec/20 23:59
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #2514:
URL: https://github.com/apache/hadoop/pull/2514#issuecomment-739083070
:confetti_ball: **+1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 30m 25s | | 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: | | 0m 0s | [test4tests](test4tests) | The patch
appears to include 1 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +0 :ok: | mvndep | 13m 25s | | Maven dependency ordering for branch |
| +1 :green_heart: | mvninstall | 23m 26s | | trunk passed |
| +1 :green_heart: | compile | 21m 24s | | trunk passed with JDK
Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04 |
| +1 :green_heart: | compile | 18m 6s | | trunk passed with JDK
Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01 |
| +1 :green_heart: | checkstyle | 2m 54s | | trunk passed |
| +1 :green_heart: | mvnsite | 2m 54s | | trunk passed |
| +1 :green_heart: | shadedclient | 23m 36s | | branch has no errors
when building and testing our client artifacts. |
| +1 :green_heart: | javadoc | 1m 57s | | trunk passed with JDK
Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04 |
| +1 :green_heart: | javadoc | 2m 58s | | trunk passed with JDK
Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01 |
| +0 :ok: | spotbugs | 3m 21s | | Used deprecated FindBugs config;
considering switching to SpotBugs. |
| +1 :green_heart: | findbugs | 5m 36s | | trunk passed |
|||| _ Patch Compile Tests _ |
| +0 :ok: | mvndep | 0m 23s | | Maven dependency ordering for patch |
| +1 :green_heart: | mvninstall | 2m 6s | | the patch passed |
| +1 :green_heart: | compile | 20m 36s | | the patch passed with JDK
Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04 |
| +1 :green_heart: | javac | 20m 36s | | the patch passed |
| +1 :green_heart: | compile | 18m 5s | | the patch passed with JDK
Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01 |
| +1 :green_heart: | javac | 18m 5s | | the patch passed |
| +1 :green_heart: | checkstyle | 2m 51s | | root: The patch generated
0 new + 83 unchanged - 6 fixed = 83 total (was 89) |
| +1 :green_heart: | mvnsite | 2m 55s | | the patch passed |
| +1 :green_heart: | whitespace | 0m 0s | | The patch has no
whitespace issues. |
| +1 :green_heart: | shadedclient | 17m 20s | | patch has no errors
when building and testing our client artifacts. |
| +1 :green_heart: | javadoc | 1m 55s | | the patch passed with JDK
Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04 |
| +1 :green_heart: | javadoc | 2m 57s | | the patch passed with JDK
Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01 |
| +1 :green_heart: | findbugs | 5m 54s | | the patch passed |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 9m 39s | | hadoop-common in the patch
passed. |
| +1 :green_heart: | unit | 117m 34s | | hadoop-hdfs in the patch
passed. |
| +1 :green_heart: | asflicense | 0m 57s | | The patch does not
generate ASF License warnings. |
| | | 348m 56s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.40 ServerAPI=1.40 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2514/2/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/2514 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient findbugs checkstyle |
| uname | Linux 53798f82afdd 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 7dda804a1a7 |
| Default Java | Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01 |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04
/usr/lib/jvm/java-8-openjdk-amd64:Private
Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2514/2/testReport/ |
| Max. process+thread count | 3233 (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-2514/2/console |
| versions | git=2.17.1 maven=3.6.0 findbugs=4.0.6 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |
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Issue Time Tracking
-------------------
Worklog Id: (was: 520379)
Time Spent: 0.5h (was: 20m)
> Optimize NetworkTopology while sorting of block locations
> ---------------------------------------------------------
>
> Key: HADOOP-17408
> URL: https://issues.apache.org/jira/browse/HADOOP-17408
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common, net
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> In {{NetworkTopology}}, I noticed that there are some hanging fruits to
> improve the performance.
> Inside {{sortByDistance}}, collections.shuffle is performed on the list
> before calling {{secondarySort}}.
> {code:java}
> Collections.shuffle(list, r);
> if (secondarySort != null) {
> secondarySort.accept(list);
> }
> {code}
> However, in different call sites, {{collections.shuffle}} is passed as the
> secondarySort to {{sortByDistance}}. This means that the shuffle is executed
> twice on each list.
> Also, logic wise, it is useless to shuffle before applying a tie breaker
> which might make the shuffle work obsolete.
> In addition, [~daryn] reported that:
> * topology is unnecessarily locking/unlocking to calculate the distance for
> every node
> * shuffling uses a seeded Random, instead of ThreadLocalRandom, which is
> heavily synchronized
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