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https://issues.apache.org/jira/browse/HBASE-30240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HBASE-30240 started by Duo Zhang.
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> TestPrefetchPersistence fails because of a file is not fully cached
> -------------------------------------------------------------------
>
> Key: HBASE-30240
> URL: https://issues.apache.org/jira/browse/HBASE-30240
> Project: HBase
> Issue Type: Sub-task
> Components: BucketCache, test
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
> Attachments: out
>
>
> {noformat}
> 2026-06-20T23:44:49,592 DEBUG [hfile-prefetch-1781970289521]
> bucket.BucketCache(2445): Prefetch executor completed for
> /home/zhangduo/hbase/code/hbase-server/target/test-data/93a585a9-e5a9-d554-3df6-1ac14eabc2ff/TestPrefetch0/6de8b2415ccc430db423ae697b3727bf,
> but only 53 data blocks were cached. Total data blocks for file: 55.
> Checking for blocks pending cache in cache writer queue.
> 2026-06-20T23:44:49,592 INFO [hfile-prefetch-1781970289521]
> bucket.BucketCache(2460): The total block count was 56. We found only 53 data
> blocks cached from a total of 55 data blocks for file
> /home/zhangduo/hbase/code/hbase-server/target/test-data/93a585a9-e5a9-d554-3df6-1ac14eabc2ff/TestPrefetch0/6de8b2415ccc430db423ae697b3727bf,
> but no blocks pending caching. Maybe cache is full or evictions happened
> concurrently to cache prefetch.
> 2026-06-20T23:44:49,593 DEBUG [hfile-prefetch-1781970289521]
> hfile.PrefetchExecutor(121): Prefetch completed for
> 6de8b2415ccc430db423ae697b3727bf
> {noformat}
> Found this in the test output, this means the file is not fully cached, we
> missed some data block in BucketCache, which fails the test.
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