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https://issues.apache.org/jira/browse/LUCENE-2030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer updated LUCENE-2030:
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Attachment: LUCENE-2030.patch
> CachingSpanFilter synchronizing on a none final protected object
> ----------------------------------------------------------------
>
> Key: LUCENE-2030
> URL: https://issues.apache.org/jira/browse/LUCENE-2030
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Affects Versions: 2.9
> Reporter: Simon Willnauer
> Priority: Minor
> Fix For: 3.1
>
> Attachments: LUCENE-2030.patch
>
>
> CachingSpanFilter and CachingWrapperFilter expose their internal cache via a
> protected member which is lazily instantiated in the getDocSetId method. The
> current code yields the chance to double instantiate the cache and internally
> synchronizes on a protected none final member. My first guess is that this
> member was exposed for testing purposes so it should rather be changed to
> package private.
> This patch breaks backwards compat while I guess the cleanup is kind of worth
> breaking it.
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