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https://issues.apache.org/jira/browse/LUCENE-2257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12832076#action_12832076
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Michael McCandless commented on LUCENE-2257:
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OK, I'm glad to hear that.
The attached patch applies to 2.9, and I think should apply fine to the
revision of Lucene you're using (779312) that you're using within Solr. I'd
recommend checking out that exact revision of Lucene (svn co -r779312 ...),
applying this patch, building a JAR, and replacing Solr's Lucene JAR with this
one.
It's only queries that contain terms above the 2.1B mark (your last ~390 M
terms) that will hit the exception. Once you find such a query it should
always hit the exception on this large segment.
> relax the per-segment max unique term limit
> -------------------------------------------
>
> Key: LUCENE-2257
> URL: https://issues.apache.org/jira/browse/LUCENE-2257
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 2.9.2, 3.0.1, 3.1
>
> Attachments: LUCENE-2257.patch
>
>
> Lucene can't handle more than 2.1B (limit of signed 32 bit int) unique terms
> in a single segment.
> But I think we can improve this to termIndexInterval (default 128) * 2.1B.
> There is one place (internal API only) where Lucene uses an int but should
> use a long.
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