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https://issues.apache.org/jira/browse/HADOOP-19712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18029900#comment-18029900
]
ASF GitHub Bot commented on HADOOP-19712:
-----------------------------------------
hadoop-yetus commented on PR #8006:
URL: https://github.com/apache/hadoop/pull/8006#issuecomment-3403808610
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 21m 13s | | 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 2 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 44m 40s | | trunk passed |
| +1 :green_heart: | compile | 17m 35s | | trunk passed |
| +1 :green_heart: | checkstyle | 1m 0s | | trunk passed |
| +1 :green_heart: | mvnsite | 1m 55s | | trunk passed |
| +1 :green_heart: | javadoc | 1m 19s | | trunk passed |
| -1 :x: | spotbugs | 1m 36s |
[/branch-spotbugs-hadoop-common-project_hadoop-common.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8006/5/artifact/out/branch-spotbugs-hadoop-common-project_hadoop-common.txt)
| hadoop-common in trunk failed. |
| +1 :green_heart: | shadedclient | 37m 4s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 1m 10s | | the patch passed |
| +1 :green_heart: | compile | 16m 48s | | the patch passed |
| +1 :green_heart: | javac | 16m 48s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| +1 :green_heart: | checkstyle | 1m 1s | | the patch passed |
| +1 :green_heart: | mvnsite | 1m 52s | | the patch passed |
| +1 :green_heart: | javadoc | 1m 17s | | the patch passed |
| -1 :x: | spotbugs | 1m 37s |
[/patch-spotbugs-hadoop-common-project_hadoop-common.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8006/5/artifact/out/patch-spotbugs-hadoop-common-project_hadoop-common.txt)
| hadoop-common in the patch failed. |
| +1 :green_heart: | shadedclient | 39m 31s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 22m 47s | | hadoop-common in the patch
passed. |
| +1 :green_heart: | asflicense | 1m 3s | | The patch does not
generate ASF License warnings. |
| | | 204m 29s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.51 ServerAPI=1.51 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8006/5/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/8006 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
| uname | Linux d65a60138612 5.15.0-157-generic #167-Ubuntu SMP Wed Sep 17
21:35:53 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 93fbc42bff57ec8dc97f2486fa6ba5ba82e31bdf |
| Default Java | Ubuntu-17.0.15+6-Ubuntu-0ubuntu120.04 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8006/5/testReport/ |
| Max. process+thread count | 1474 (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-8006/5/console |
| versions | git=2.25.1 maven=3.9.11 |
| Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
This message was automatically generated.
> S3A: Deadlock observed in IOStatistics EvaluatingStatisticsMap.entryset()
> -------------------------------------------------------------------------
>
> Key: HADOOP-19712
> URL: https://issues.apache.org/jira/browse/HADOOP-19712
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs, fs/s3
> Affects Versions: 3.3.6, 3.4.2
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
>
> We have evidence that `IOStatisticsSupport.snapshotIOStatistics()` can hang,
> specifically on the statistics collected by an S3AInputStream, whose
> statistics are merged in to the FS stats in close();
> {code}
> jdk.internal.misc.Unsafe.park(Native Method)
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
> java.util.concurrent.ForkJoinTask.awaitDone(ForkJoinTask.java:468)
> java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:687)
> java.util.stream.ReduceOps$ReduceOp.evaluateParallel(ReduceOps.java:927)
> java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:233)
> java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
> org.apache.hadoop.fs.statistics.impl.EvaluatingStatisticsMap.entrySet(EvaluatingStatisticsMap.java:166)
> java.util.Collections$UnmodifiableMap.entrySet(Collections.java:1529)
> org.apache.hadoop.fs.statistics.impl.IOStatisticsBinding.copyMap(IOStatisticsBinding.java:172)
> org.apache.hadoop.fs.statistics.impl.IOStatisticsBinding.snapshotMap(IOStatisticsBinding.java:216)
> org.apache.hadoop.fs.statistics.impl.IOStatisticsBinding.snapshotMap(IOStatisticsBinding.java:199)
> org.apache.hadoop.fs.statistics.IOStatisticsSnapshot.snapshot(IOStatisticsSnapshot.java:165)
> org.apache.hadoop.fs.statistics.IOStatisticsSnapshot.<init>(IOStatisticsSnapshot.java:125)
> org.apache.hadoop.fs.statistics.IOStatisticsSupport.snapshotIOStatistics(IOStatisticsSupport.java:49)
> {code}
> the code in question is calling `parallelStream()`, which uses a fixed pool
> of threads shared by all uses of the API
> {code}
> Set<Entry<String, E>> r = evalEntries.parallelStream().map((e) ->
> new EntryImpl<>(e.getKey(), e.getValue().apply(e.getKey())))
> .collect(Collectors.toSet());
> {code}
> Proposed:
> * move off parallelStream() to stream()
> * review code to if there is any other way this iteration can lead to a
> deadlock, e.g. the apply() calls.
> * could we do the merge more efficiently?
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