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https://issues.apache.org/jira/browse/SOLR-7787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14626920#comment-14626920
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David Smiley commented on SOLR-7787:
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I think we should avoid very large dependencies that we so barely use. +1 to
Fork HLL so that we needn't use FastUtil.
Perhaps it would be useful to fork HLL publicly (e.g. on GitHub & publish to
maven) to be its own 3rd party dependency -- I imagine others aren't too keen
on using a 17MB library that they aren't already using. Ideally this would be
condoned with the original library owner to use their maven groupId but
differentiated in the artifactId, but it isn't necessary of course.
> 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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