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https://issues.apache.org/jira/browse/LUCENE-1919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12756903#action_12756903
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Jason Rutherglen commented on LUCENE-1919:
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With SOLR-908 CommonGramsQueryFilter which uses the old API,
we've been seeing since we upgraded to Solr 1.4/Lucene 2.9,
random negations to query clauses. It almost looks like there's
some sort of shared state or multithreading issue, however I've
also thought somehow it's related to mixing the old and new
APIs. Unfortunately it's so inconsistent I don't have a test
case that reproduces it (happens in production only).
Is there any sort of shared state in the analyzing, possibly
between instances that is fixed in this patch?
> Analysis back compat break
> --------------------------
>
> Key: LUCENE-1919
> URL: https://issues.apache.org/jira/browse/LUCENE-1919
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Yonik Seeley
> Fix For: 2.9
>
> Attachments: LUCENE-1919.patch, LUCENE-1919.patch, LUCENE-1919.patch
>
>
> Old and new style token streams don't mix well.
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