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https://issues.apache.org/jira/browse/SOLR-3424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13266617#comment-13266617
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David Smiley commented on SOLR-3424:
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I'll commit it in ~24 hours.
> PhoneticFilterFactory threadsafety bug
> --------------------------------------
>
> Key: SOLR-3424
> URL: https://issues.apache.org/jira/browse/SOLR-3424
> Project: Solr
> Issue Type: Bug
> Components: Schema and Analysis
> Affects Versions: 3.6, 4.0
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Minor
> Fix For: 4.0
>
> Attachments: SOLR-3424_PhoneticFilterFactory_threadsafety_bug.patch,
> SOLR-3424_PhoneticFilterFactory_threadsafety_bug.patch,
> SOLR-3424_PhoneticFilterFactory_threadsafety_bug.patch,
> SOLR-3424_PhoneticFilterFactory_threadsafety_bug.patch,
> SOLR-3424_PhoneticFilterFactory_threadsafety_bug.patch
>
>
> PhoneticFilterFactory has a static HashMap registry mapping an encoder name
> to an implementation. There is a ReentrantLock used when the map is modified
> (when the encoder config specifies a class name). However, this map, which
> can be accessed by multiple indexing threads, isn't guarded on any of the
> reads, which isn't just the common path but also the error messages which
> dump the registry into the error message.
> I realize the likelihood of a problem is extremely slim, but a bug's a bug.
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