bshashikant edited a comment on issue #1349: HDDS-2026. Overlapping chunk region cannot be read concurrently URL: https://github.com/apache/hadoop/pull/1349#issuecomment-525200958 Thanks @adoroszlai for working on this. The locking logic seems good to me. But in Ozone world, a chunk once written is immutable , and hence we might not need the lock at all while reading a chunk. @anuengineer @elek @mukul1987 what do you think? There is also a race condition which exists in the system where a chunk might get deleted by BlockDeleting service in Datanode while readChunk is happening which is where i think we need to have synchronization on a container level (not precisely at the chunk level) for closed containers but this problem is beyond the scope of this jira.
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