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https://issues.apache.org/jira/browse/LUCENE-8398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Erick Erickson resolved LUCENE-8398.
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Resolution: Fixed
Fix Version/s: 7.5
master (8.0)
> TieredMergePolicy.getMaxMergedSegmentMB has rounding error
> ----------------------------------------------------------
>
> Key: LUCENE-8398
> URL: https://issues.apache.org/jira/browse/LUCENE-8398
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/other
> Reporter: Erick Erickson
> Assignee: Erick Erickson
> Priority: Minor
> Fix For: master (8.0), 7.5
>
> Attachments: LUCENE-8398.patch, LUCENE-8398.patch
>
>
> This is largely a test artifact since it's unlikely to show up for
> realistically sized segments, but the fix is simple and safe.
> This code first does long division then promotes to double for the last
> calculation.
> {code}
> return maxMergedSegmentBytes/1024/1024.;
> {code}
> The error can be reproduced with: -Dtests.seed=EF80BCABAD74A7CF
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