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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2943) ICU collator thread-safety issues
Date Mon, 28 Feb 2011 20:43:37 GMT
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


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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