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https://issues.apache.org/jira/browse/HDDS-15698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18093307#comment-18093307
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Attila Doroszlai commented on HDDS-15698:
-----------------------------------------
Observed on {{master}} only once:
https://github.com/adoroszlai/ozone-build-results/tree/master/2026/05/28/49274/integration-filesystem
In addition to that, I only saw it once in fork or PR run (the one reported in
description), so it may be very infrequent. You may use
[flaky-test-check|https://github.com/navinko/ozone/actions/workflows/intermittent-test-check.yml]
to trigger many runs.
Also, please feel free to skip this for now.
> Intermittent outOfBounds in testConcurrentWriteHSync
> ----------------------------------------------------
>
> Key: HDDS-15698
> URL: https://issues.apache.org/jira/browse/HDDS-15698
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Attila Doroszlai
> Assignee: Navin Kumar
> Priority: Major
> Attachments: org.apache.hadoop.fs.ozone.TestHSync-output.txt,
> org.apache.hadoop.fs.ozone.TestHSync.txt
>
>
> {code}
> Tests run: 41, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 182.5 s <<<
> FAILURE! -- in org.apache.hadoop.fs.ozone.TestHSync
> org.apache.hadoop.fs.ozone.TestHSync.testConcurrentWriteHSync(int, int,
> boolean)[1] -- Time elapsed: 0.986 s <<< ERROR!
> java.lang.IndexOutOfBoundsException: Index 7 out of bounds for length 7
> ...
> at java.base/java.util.ArrayList.get(ArrayList.java:427)
> at
> org.apache.hadoop.ozone.client.io.BlockOutputStreamEntryPool.getCurrentStreamEntry(BlockOutputStreamEntryPool.java:373)
> at
> org.apache.hadoop.ozone.client.io.KeyOutputStream.handleFlushOrClose(KeyOutputStream.java:576)
> at
> org.apache.hadoop.ozone.client.io.KeyOutputStream.hsync(KeyOutputStream.java:542)
> at
> org.apache.hadoop.ozone.client.io.OzoneOutputStream.hsync(OzoneOutputStream.java:125)
> at
> org.apache.hadoop.hdds.tracing.TracingUtil.executeInSpan(TracingUtil.java:296)
> at
> org.apache.hadoop.hdds.tracing.TracingUtil.executeInNewSpan(TracingUtil.java:260)
> at
> org.apache.hadoop.fs.ozone.OzoneFSOutputStream.hsync(OzoneFSOutputStream.java:74)
> at
> org.apache.hadoop.fs.FSDataOutputStream.hsync(FSDataOutputStream.java:145)
> at
> org.apache.hadoop.fs.ozone.TestHSync.lambda$runConcurrentWriteHSync$12(TestHSync.java:939)
> {code}
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