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https://issues.apache.org/jira/browse/LUCENE-1771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12739145#action_12739145
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Mark Miller commented on LUCENE-1771:
-------------------------------------
CustomScoreQuery has no access to the top level Searcher without docking it on
the QueryWeight -
/*(non-Javadoc) @see org.apache.lucene.search.Scorer#explain(int) */
public Explanation explain(int doc) throws IOException {
Explanation subQueryExpl = weight.subQueryWeight.explain(null,
reader,doc); // nocommit: needs resolution
> Using explain may double ram reqs for fieldcaches when using
> ValueSourceQuery/CustomScoreQuery or for ConstantScoreQuerys that use a
> caching Filter.
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-1771
> URL: https://issues.apache.org/jira/browse/LUCENE-1771
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Reporter: Mark Miller
> Assignee: Mark Miller
> Fix For: 2.9
>
> Attachments: LUCENE-1771.patch
>
>
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