Walter Su created HDFS-10316:
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Summary: revisit corrupt replicas count
Key: HDFS-10316
URL: https://issues.apache.org/jira/browse/HDFS-10316
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Walter Su
A DN has 4 types of storages:
1. NORMAL
2. READ_ONLY
3. FAILED
4. (missing/pruned)
blocksMap.numNodes(blk) counts 1,2,3
blocksMap.getStorages(blk) counts 1,2,3
countNodes(blk).corruptReplicas() counts 1,2
corruptReplicas counts 1,2,3,4. Because findAndMarkBlockAsCorrupt(..) supports
adding blk to the map even if the storage is not found.
The inconsistency causes bugs like HDFS-9958.
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