echonesis opened a new pull request, #11921:
URL: https://github.com/apache/ozone/pull/11921

   ## What changes were proposed in this pull request?
   EC reconstruction reads can return data from the wrong stripe after 
switching an index to a spare replica. The newly opened stream starts at offset 
zero, but closing the failed stream does not mark it as requiring a seek. 
Subsequent reads can therefore use data from an earlier stripe without 
reporting an error.
   
   This pull request:
   - Marks closed streams as requiring a seek, so a spare replica is positioned 
at the current stripe before reading.
   - Adds regression tests for reconstruction and proxy reads, covering missing 
locations, failover at position zero, and an explicit seek before reading.
   - Verifies that reads remain correct across subsequent stripes and reach the 
expected end of the block.
   
   ## What is the link to the Apache JIRA
   
   https://issues.apache.org/jira/browse/HDDS-16999
   
   ## How was this patch tested?
   
   ### Local Tests
   
   ```bash
   # HDDS client unit tests
   mvn -pl :hdds-client test \
     
-Dtest=TestECBlockInputStream,TestECBlockInputStreamProxy,TestECBlockReconstructedInputStream,TestECBlockReconstructedStripeInputStream
 \
     -DskipShade -DskipRecon
   ```
   
   GitHub Actions CI: 
https://github.com/echonesis/ozone/actions/runs/41575296866
   
   Generated-by: Codex (GPT-6)
   


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