Nick Dimiduk created HBASE-25642:
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Summary: Fix or stop warning about already cached block
Key: HBASE-25642
URL: https://issues.apache.org/jira/browse/HBASE-25642
Project: HBase
Issue Type: Improvement
Components: BlockCache, regionserver
Affects Versions: 2.3.0
Reporter: Nick Dimiduk
Our logs have as a fairly common occurrence:
{noformat}
2021-03-05 22:24:31,034 WARN [StoreFileOpener-foo-1] hfile.BlockCacheUtil:
Caching an already cached block: blah.bub. This is harmless and can happen in
rare cases (see HBASE-8547)
{noformat}
If this is really harmless, why do we log? If it's not actually harmless, let's
take another pass at fixing this situation.
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