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https://issues.apache.org/jira/browse/SOLR-4586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13603886#comment-13603886
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Jack Krupansky commented on SOLR-4586:
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bq. ... keep parsing and enforcing the limit in 4.3, then do my current patch 
in 5.0?

Yeah, a normal approach to deprecation - mark it in the solrconfig.xml  and 
Javadoc for 4.x as deprecated, but not remove until 5.0.

One additional twist: Raise the limit in the solrconfig.xml to 10,000 or 
100,000 or 2 billion, or whatever to effectively remove/relax the limit in 4.x 
before final removal in trunk/5.0.
                
> Remove maxBooleanClauses from Solr
> ----------------------------------
>
>                 Key: SOLR-4586
>                 URL: https://issues.apache.org/jira/browse/SOLR-4586
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: 4.2
>         Environment: 4.3-SNAPSHOT 1456767M - ncindex - 2013-03-15 13:11:50
>            Reporter: Shawn Heisey
>         Attachments: SOLR-4586.patch
>
>
> In the #solr IRC channel, I mentioned the maxBooleanClauses limitation to 
> someone asking a question about queries.  Mark Miller told me that 
> maxBooleanClauses no longer applies, that the limitation was removed from 
> Lucene sometime in the 3.x series.  The config still shows up in the example 
> even in the just-released 4.2.
> Checking through the source code, I found that the config option is parsed 
> and the value stored in objects, but does not actually seem to be used by 
> anything.  I removed every trace of it that I could find, and all tests still 
> pass.

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