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Posted to jira@arrow.apache.org by "James Henderson (Jira)" <ji...@apache.org> on 2021/12/21 17:10:00 UTC
[jira] [Created] (ARROW-15175) MurmurHasher doesn't take the final bytes into account if size % 4 != 0
James Henderson created ARROW-15175:
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Summary: MurmurHasher doesn't take the final bytes into account if size % 4 != 0
Key: ARROW-15175
URL: https://issues.apache.org/jira/browse/ARROW-15175
Project: Apache Arrow
Issue Type: Bug
Components: Java
Affects Versions: 6.0.1
Reporter: James Henderson
Repro (for example): all buffers of size 1 hash to the same value (-1684229222)
To my untrained eye, it looks like [https://github.com/apache/arrow/blob/c9588c54a1264ce02abc70cd02486966a1e97acf/java/memory/memory-core/src/main/java/org/apache/arrow/memory/util/hash/MurmurHasher.java#L99] should range from `length - 1` rather than `index - 1`?
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