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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2014/03/17 05:40:45 UTC

[jira] [Created] (LUCENE-5532) AutomatonQuery.hashCode is not thread safe

Robert Muir created LUCENE-5532:
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             Summary: AutomatonQuery.hashCode is not thread safe
                 Key: LUCENE-5532
                 URL: https://issues.apache.org/jira/browse/LUCENE-5532
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Robert Muir


This hashCode is implemented based on  #states and #transitions.

These methods use getNumberedStates() though, which may oversize itself during construction and then "size down" when its done. But numberedStates is prematurely set (before its "ready"), which can cause a hashCode call from another thread to see a corrupt state... causing things like NPEs from null states and other strangeness. I don't think we should set this variable until its "finished".



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