[
https://issues.apache.org/jira/browse/HDFS-17962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18104735#comment-18104735
]
ASF GitHub Bot commented on HDFS-17962:
---------------------------------------
hadoop-yetus commented on PR #8677:
URL: https://github.com/apache/hadoop/pull/8677#issuecomment-5291383248
:confetti_ball: **+1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 0m 54s | | 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 :green_heart: | test4tests | 0m 0s | | The patch appears to
include 1 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 48m 20s | | trunk passed |
| +1 :green_heart: | compile | 1m 47s | | trunk passed with JDK
Ubuntu-21.0.11+10-1-24.04.2-Ubuntu |
| +1 :green_heart: | compile | 1m 47s | | trunk passed with JDK
Ubuntu-17.0.19+10-1-24.04.2-Ubuntu |
| +1 :green_heart: | checkstyle | 1m 50s | | trunk passed |
| +1 :green_heart: | mvnsite | 1m 58s | | trunk passed |
| +1 :green_heart: | javadoc | 1m 30s | | trunk passed with JDK
Ubuntu-21.0.11+10-1-24.04.2-Ubuntu |
| +1 :green_heart: | javadoc | 1m 30s | | trunk passed with JDK
Ubuntu-17.0.19+10-1-24.04.2-Ubuntu |
| +1 :green_heart: | spotbugs | 4m 22s | | trunk passed |
| +1 :green_heart: | shadedclient | 38m 26s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 1m 24s | | the patch passed |
| +1 :green_heart: | compile | 1m 16s | | the patch passed with JDK
Ubuntu-21.0.11+10-1-24.04.2-Ubuntu |
| +1 :green_heart: | javac | 1m 16s | | the patch passed |
| +1 :green_heart: | compile | 1m 19s | | the patch passed with JDK
Ubuntu-17.0.19+10-1-24.04.2-Ubuntu |
| +1 :green_heart: | javac | 1m 19s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| +1 :green_heart: | checkstyle | 1m 19s | | the patch passed |
| +1 :green_heart: | mvnsite | 1m 29s | | the patch passed |
| +1 :green_heart: | javadoc | 1m 0s | | the patch passed with JDK
Ubuntu-21.0.11+10-1-24.04.2-Ubuntu |
| +1 :green_heart: | javadoc | 1m 2s | | the patch passed with JDK
Ubuntu-17.0.19+10-1-24.04.2-Ubuntu |
| +1 :green_heart: | spotbugs | 4m 4s | | the patch passed |
| +1 :green_heart: | shadedclient | 38m 4s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 264m 14s | | hadoop-hdfs in the patch
passed. |
| +1 :green_heart: | asflicense | 0m 50s | | The patch does not
generate ASF License warnings. |
| | | 416m 29s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.55 ServerAPI=1.55 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8677/2/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/8677 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
| uname | Linux c1f80bd876c2 5.15.0-185-generic #195-Ubuntu SMP Fri Jun 19
17:11:50 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 6d6b9dcaf5c1c7fd98f5738fac82316e97e47bb1 |
| Default Java | Ubuntu-17.0.19+10-1-24.04.2-Ubuntu |
| Multi-JDK versions |
/usr/lib/jvm/java-21-openjdk-amd64:Ubuntu-21.0.11+10-1-24.04.2-Ubuntu
/usr/lib/jvm/java-17-openjdk-amd64:Ubuntu-17.0.19+10-1-24.04.2-Ubuntu |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8677/2/testReport/ |
| Max. process+thread count | 3344 (vs. ulimit of 10000) |
| 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-8677/2/console |
| versions | git=2.43.0 maven=3.9.15 spotbugs=4.9.7 |
| Powered by | Apache Yetus 0.14.1 https://yetus.apache.org |
This message was automatically generated.
> NNTop may lose user metrics during expired window cleanup
> ---------------------------------------------------------
>
> Key: HDFS-17962
> URL: https://issues.apache.org/jira/browse/HDFS-17962
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Yue Wang
> Assignee: Yue Wang
> Priority: Major
> Labels: pull-request-available
>
> NNTop stores a RollingWindow for each (metric, user) pair in a
> ConcurrentHashMap.
> In RollingWindowManager#getTopUsersForMetric(), expired user windows are
> removed when getSum(time) returns 0. Previously, the cleanup used an iterator
> to remove the map entry, while RollingWindowManager#recordMetric() obtained a
> RollingWindow from the map and incremented it outside of any per-key atomic
> operation.
> This allows the following race:
> 1. A recordMetric() thread obtains an existing RollingWindow for a user.
> 2. A snapshot thread observes that the window sum is 0 and removes the
> user-to-window mapping.
> 3. The recordMetric() thread increments the RollingWindow it obtained earlier.
> 4. The increment is applied to an object that is no longer in the map, so the
> metric is lost from subsequent NNTop snapshots.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
