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https://issues.apache.org/jira/browse/LUCENE-6531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14588082#comment-14588082
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Cao Manh Dat commented on LUCENE-6531:
--------------------------------------
I agree that it will be nice if Lucene is backward compatible. I will open an
issue where we can discuss more about PhraseQuery modification.
> Make PhraseQuery immutable
> --------------------------
>
> Key: LUCENE-6531
> URL: https://issues.apache.org/jira/browse/LUCENE-6531
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Fix For: Trunk
>
> Attachments: LUCENE-6531.patch, LUCENE-6531.patch
>
>
> Mutable queries are an issue for automatic filter caching since modifying a
> query after it has been put into the cache will corrupt the cache. We should
> make all queries immutable (up to the boost) to avoid this issue.
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