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https://issues.apache.org/jira/browse/HBASE-30320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Viraj Jasani updated HBASE-30320:
---------------------------------
Fix Version/s: 4.0.0-alpha-1
2.7.0
3.1.0
3.0.1
Hadoop Flags: Reviewed
Resolution: Fixed
Status: Resolved (was: Patch Available)
> TestMemStoreLAB#testLABChunkQueue OOM on fast hardware due to unbounded
> off-pool chunk allocation
> -------------------------------------------------------------------------------------------------
>
> Key: HBASE-30320
> URL: https://issues.apache.org/jira/browse/HBASE-30320
> Project: HBase
> Issue Type: Bug
> Components: test
> Affects Versions: 2.5.16, 2.6.7
> Reporter: Umesh Kumar Kumawat
> Assignee: Umesh Kumar Kumawat
> Priority: Minor
> Labels: pull-request-available
> Fix For: 4.0.0-alpha-1, 2.7.0, 3.1.0, 3.0.1
>
>
> The test spawns 10 threads that allocate 256KB chunks in a tight loop for a
> fixed 1-second window (Thread.sleep(1000)). Once the ChunkCreator pool
> reaches its maxCount, subsequent allocations fall through
> to unbounded off-pool chunk creation (ChunkCreator#createChunk). All chunks
> remain live in mslab.chunks until mslab.close() is called after the threads
> stop.
> On fast hardware (Apple Silicon, high memory bandwidth), threads complete
> ~5,000 iterations/thread/sec, creating ~50,000 chunks (~12.5GB) in that
> 1-second window. On slower x86 CI machines, the same
> window produces only ~700 iterations/thread/sec (~1.7GB), fitting within
> the default 2.2GB surefire heap.
> The test's memory consumption is non-deterministic — it depends on
> CPU/memory speed rather than a fixed workload.
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