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https://issues.apache.org/jira/browse/HBASE-4206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096302#comment-13096302
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Ron Yang commented on HBASE-4206:
---------------------------------
I wrote a data generator and did before/after hash comparisons. I also wrote a
test to verify that signed int arithmetic behaves the same as long arithmetic
truncated to int. The new code has been running in production here for a few
weeks and behaving satisfactorily, although in a non-mission-critical capacity.
> jenkins hash implementation uses longs unnecessarily
> ----------------------------------------------------
>
> Key: HBASE-4206
> URL: https://issues.apache.org/jira/browse/HBASE-4206
> Project: HBase
> Issue Type: Improvement
> Components: util
> Affects Versions: 0.90.4
> Reporter: Ron Yang
> Priority: Minor
> Fix For: 0.92.0, 0.90.5
>
> Attachments: ryang.patch
>
>
> I don't believe you need to use long for a,b,c and as a result no longer need
> to & against INT_MASK.
> At a minimum the private static longs should be made final, and the "main"
> method should not print the absolute value of the hash but instead use
> something like Integer.toHexString
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