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https://issues.apache.org/jira/browse/HADOOP-18296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17957368#comment-17957368
]
ASF GitHub Bot commented on HADOOP-18296:
-----------------------------------------
hadoop-yetus commented on PR #7732:
URL: https://github.com/apache/hadoop/pull/7732#issuecomment-2957249085
:confetti_ball: **+1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 19m 10s | | 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.
|
| +0 :ok: | markdownlint | 0m 0s | | markdownlint 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. |
|||| _ branch-3.4 Compile Tests _ |
| +1 :green_heart: | mvninstall | 39m 7s | | branch-3.4 passed |
| +1 :green_heart: | compile | 19m 28s | | branch-3.4 passed with JDK
Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 |
| +1 :green_heart: | compile | 20m 30s | | branch-3.4 passed with JDK
Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09 |
| +1 :green_heart: | checkstyle | 1m 26s | | branch-3.4 passed |
| +1 :green_heart: | mvnsite | 1m 54s | | branch-3.4 passed |
| +1 :green_heart: | javadoc | 1m 27s | | branch-3.4 passed with JDK
Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 |
| +1 :green_heart: | javadoc | 0m 54s | | branch-3.4 passed with JDK
Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09 |
| +1 :green_heart: | spotbugs | 3m 4s | | branch-3.4 passed |
| +1 :green_heart: | shadedclient | 42m 58s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 0m 56s | | the patch passed |
| +1 :green_heart: | compile | 18m 20s | | the patch passed with JDK
Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 |
| +1 :green_heart: | javac | 18m 20s | | the patch passed |
| +1 :green_heart: | compile | 17m 52s | | the patch passed with JDK
Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09 |
| +1 :green_heart: | javac | 17m 52s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| -0 :warning: | checkstyle | 1m 16s |
[/results-checkstyle-hadoop-common-project_hadoop-common.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7732/2/artifact/out/results-checkstyle-hadoop-common-project_hadoop-common.txt)
| hadoop-common-project/hadoop-common: The patch generated 10 new + 71
unchanged - 0 fixed = 81 total (was 71) |
| +1 :green_heart: | mvnsite | 1m 36s | | the patch passed |
| +1 :green_heart: | javadoc | 1m 9s | | the patch passed with JDK
Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 |
| +1 :green_heart: | javadoc | 0m 50s | | the patch passed with JDK
Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09 |
| +1 :green_heart: | spotbugs | 2m 43s | | the patch passed |
| +1 :green_heart: | shadedclient | 39m 43s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 19m 35s | | hadoop-common in the patch
passed. |
| +1 :green_heart: | asflicense | 1m 4s | | The patch does not
generate ASF License warnings. |
| | | 256m 12s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.50 ServerAPI=1.50 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7732/2/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/7732 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets markdownlint
|
| uname | Linux eae6368fc6d0 5.15.0-139-generic #149-Ubuntu SMP Fri Apr 11
22:06:13 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | branch-3.4 / 86d6bacafd412602e80e5085f33e906aa40d5a4c |
| Default Java | Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09 |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
/usr/lib/jvm/java-8-openjdk-amd64:Private
Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7732/2/testReport/ |
| Max. process+thread count | 1263 (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-7732/2/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.
> Memory fragmentation in ChecksumFileSystem Vectored IO implementation.
> ----------------------------------------------------------------------
>
> Key: HADOOP-18296
> URL: https://issues.apache.org/jira/browse/HADOOP-18296
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: common
> Affects Versions: 3.4.0
> Reporter: Mukund Thakur
> Assignee: Steve Loughran
> Priority: Minor
> Labels: fs, pull-request-available
>
> As we have implemented merging of ranges in the ChecksumFSInputChecker
> implementation of vectored IO api, it can lead to memory fragmentation. Let
> me explain by example.
>
> Suppose client requests for 3 ranges.
> 0-500, 700-1000 and 1200-1500.
> Now because of merging, all the above ranges will get merged into one and we
> will allocate a big byte buffer of 0-1500 size but return sliced byte buffers
> for the desired ranges.
> Now once the client is done reading all the ranges, it will only be able to
> free the memory for requested ranges and memory of the gaps will never be
> released for eg here (500-700 and 1000-1200).
>
> Note this only happens for direct byte buffers.
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