[jira] [Created] (HBASE-27464) In memory compaction 'COMPACT' may cause data mass when add cell bigger than maxAlloc(default 256k) size.

["zhuobin zheng (Jira)" <ji...@apache.org>]

zhuobin zheng created HBASE-27464:
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             Summary: In memory compaction 'COMPACT' may cause data mass when add cell bigger than maxAlloc(default 256k) size.
                 Key: HBASE-27464
                 URL: https://issues.apache.org/jira/browse/HBASE-27464
             Project: HBase
          Issue Type: Bug
          Components: in-memory-compaction
            Reporter: zhuobin zheng
         Attachments: image-2022-11-04-15-46-21-645.png

When init 'CellChunkImmutableSegment' for 'COMPACT' action, we not force copy to current MSLab. 

When cell size bigger than maxAlloc, cell will stay in previous chunk which will recycle after segment replace, and we may read wrong data when these chunk reused by others.

!image-2022-11-04-15-46-21-645.png!

 

Timeline:
 # add a cell 'A' bigger than 256K
 # cell 'A' will copy to a chunk 'A' when first compact
 # cell 'A' will retain in chunk 'A' when second compact
 # chunk 'A' recycled after segment swap and close



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