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https://issues.apache.org/jira/browse/LUCENE-2815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12971909#action_12971909
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Yonik Seeley commented on LUCENE-2815:
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So I started looking into MultiFields more closely, just from a performance
perspective, and noticed a couple of thread safety issues:
- MultiFields is reused (a good thing), but isn't safely published to other
threads.
- MultiFields has a HashMap that is used and modified unsynchronized to cache
MultiTerms instances
> MultiFields not thread safe
> ---------------------------
>
> Key: LUCENE-2815
> URL: https://issues.apache.org/jira/browse/LUCENE-2815
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 4.0
> Reporter: Yonik Seeley
>
> MultiFields looks like it has thread safety issues
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