ICU collator thread-safety issues
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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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