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https://issues.apache.org/jira/browse/SOLR-14256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17048403#comment-17048403
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ASF subversion and git services commented on SOLR-14256:
--------------------------------------------------------

Commit 37281783209cef2e7d30d21a298bea671a1ea52b in lucene-solr's branch 
refs/heads/branch_8x from David Smiley
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=3728178 ]

SOLR-14256, SOLR-14258: Deprecations


> Remove HashDocSet
> -----------------
>
>                 Key: SOLR-14256
>                 URL: https://issues.apache.org/jira/browse/SOLR-14256
>             Project: Solr
>          Issue Type: Task
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: search
>            Reporter: David Smiley
>            Assignee: David Smiley
>            Priority: Major
>             Fix For: master (9.0)
>
>
> This particular DocSet is only used in places where we need to convert 
> SortedIntDocSet in particular to a DocSet that is fast for random access.  
> Once such a conversion happens, it's only used to test some docs for presence 
> and it could be another interface.  DocSet has kind of a large-ish API 
> surface area to implement.  Since we only need to test docs, we could use 
> Bits interface (having only 2 methods) backed by an off-the-shelf primitive 
> long hash set on our classpath.  Perhaps a new method on DocSet: getBits() or 
> DocSetUtil.getBits(DocSet).
> In addition to removing complexity unto itself, this improvement is required 
> by SOLR-14185 because it wants to be able to produce a DocIdSetIterator slice 
> directly from the DocSet but HashDocSet can't do that without sorting first.



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