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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (LUCENE-2943) ICU collator thread-safety issues
Date Tue, 01 Mar 2011 20:50:40 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-2943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Muir resolved LUCENE-2943.
---------------------------------

    Resolution: Fixed

Committed revisions 1075850, 1076017 (branch_3x)

> ICU collator thread-safety issues
> ---------------------------------
>
>                 Key: LUCENE-2943
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2943
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Analysis
>            Reporter: Robert Muir
>             Fix For: 3.1, 4.0
>
>         Attachments: LUCENE-2943.patch, LUCENE-2943.patch, LUCENE-2943.patch
>
>
> The ICU Collators (unlike the JDK ones) aren't thread safe: http://userguide.icu-project.org/collation/architecture
, a little non-obvious since its not mentioned
> in the javadocs, and its not clear if the docs apply to only the C code, but i looked
> at the source and there is all kinds of internal state.
> So in my opinion, we should clone the icu collators (which are passed in from the outside)

> when creating a new TokenStream/AttributeImpl to prevent problems. This shouldn't be
a big
> deal since everything uses reusableTokenStream anyway.

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