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https://issues.apache.org/jira/browse/LUCENE-8890?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-8890.
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Resolution: Fixed
Fix Version/s: 8.2
master (9.0)
Thank you [~svamann], sorry it took so long to merge your change.
> Parallel Iteration of Lists
> ---------------------------
>
> Key: LUCENE-8890
> URL: https://issues.apache.org/jira/browse/LUCENE-8890
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Sven Amann
> Priority: Minor
> Labels: pull-request-available
> Fix For: master (9.0), 8.2
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Solr/contrib/analysis-extras contains the class `BooleanWeight`, which
> maintains two lists that are repeatedly iterated over in parallel. While both
> lists do have the same length, this is not immediately obvious from the
> locations the iterate them. A future change may lead to the lists getting our
> of sync, which would break the iterations. Moreover, there is no established
> language feature for iterating two lists, which is why the iteration is
> implemented differently in various locations throughout the class.
> I created a patch that joins the two lists into one, which simplifies the
> iteration, unifies the implementation in all places, and prevents that the
> two lists get out of sync without becoming aware of the parallel iterations.
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