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https://issues.apache.org/jira/browse/SOLR-7787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14626656#comment-14626656
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Hoss Man commented on SOLR-7787:
--------------------------------

I don't have any strong opinions about this issue as it currently stands (ie: 
"Fork HyperLogLog and remove fastutil dependency") -- as you mentioned, the 
java-hll project, with it's original goals of a cross langauge binary format 
protocol, doesn't appear to be very active anymore -- but for the record can 
you please clarify the context/objective of this issue?

It started out as "Promote fastutil to first-order dependency" -- and your goal 
seemed to be to remove HPPC, now you seem to have flipped the objective so that 
the focus is on keeping HPPC, and eliminating fastutil.

having a clear understanding of "the goal" for either refactoring/forking/etc 
would be helpful for folks to develop an informed opinion.

> Fork HyperLogLog and remove fastutil dependency
> -----------------------------------------------
>
>                 Key: SOLR-7787
>                 URL: https://issues.apache.org/jira/browse/SOLR-7787
>             Project: Solr
>          Issue Type: Task
>            Reporter: Dawid Weiss
>            Assignee: Dawid Weiss
>            Priority: Trivial
>             Fix For: 5.3, Trunk
>
>
> So fastutil is now part of Solr's distribution (because the stats component 
> uses hyperloglog library, which in turn requires fastutil). I looked at the 
> actual uses of fastutil and only java-hll uses it (and only a few classes).
> I've created a fork that uses HPPC instead (also randomized all tests, they 
> pass). Since it's a relatively simple package I think it could be forked and 
> imported into Solr's codebase entirely. I'd make a pull request but I see 
> Hoss also created a few comments/ PRs and none of them received any 
> attention; the project seems to be stale or dead?



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