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https://issues.apache.org/jira/browse/HDDS-15857?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chung-En Lee updated HDDS-15857:
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Priority: Major (was: Critical)
> Fix checksum calculation in KeyValueHandler for variable-sized chunks
> ---------------------------------------------------------------------
>
> Key: HDDS-15857
> URL: https://issues.apache.org/jira/browse/HDDS-15857
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Chung-En Lee
> Assignee: Chung-En Lee
> Priority: Major
>
> Currently, the `getChecksums` method in `KeyValueHandler.java` fails or
> returns incorrect checksums when chunks have variable sizes or are smaller
> than bytesPerChunk.
> The original code assumes all chunks (except the last one) have a fixed size
> equal to `bytesPerChunk`. This assumption is incorrect when chunks have
> different lengths, leading to wrong index calculations.
> Crucially, when checksum verification is enabled, the DataNode must return
> the actual ChunkInfo (which contains chunk lengths) to the client. Without
> this metadata, the client cannot perceive the boundaries of each varying
> chunk, making it impossible to correctly map the offsets and compute/verify
> the checksums.
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