Xiaolin Ha created HBASE-27882:
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Summary: Avoid always reinit the decompressor in the hot read path
Key: HBASE-27882
URL: https://issues.apache.org/jira/browse/HBASE-27882
Project: HBase
Issue Type: Improvement
Components: regionserver
Affects Versions: 2.5.4, 3.0.0-alpha-3
Reporter: Xiaolin Ha
Assignee: Xiaolin Ha
Attachments: image-2023-05-24-11-06-48-569.png
When seting "hbase.block.data.cachecompressed=true", the cached blocks are
decompressed when reading. But we are using pooled decompressors here, which
means the decompressor configs should be refreshed as a prepare job before each
decompressing, see the line here
[https://github.com/apache/hbase/blob/22526a6339afa230679bcf08fa1c917b04cdac6d/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockDefaultDecodingContext.java#L99]
I have pointed out the lock of Configuration.get problem in HBASE-27672, it
should be avoid when reiniting in the hot read path either.
!image-2023-05-24-11-06-48-569.png|width=668,height=286!
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