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  1. Lucene - Core
  2. LUCENE-8398

TieredMergePolicy.getMaxMergedSegmentMB has rounding error

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Details

    • Improvement
    • Status: Closed
    • Minor
    • Resolution: Fixed
    • None
    • 7.5, 8.0
    • core/other
    • None
    • New

    Description

      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.

       return maxMergedSegmentBytes/1024/1024.;
      

      The error can be reproduced with: -Dtests.seed=EF80BCABAD74A7CF

      Attachments

        1. LUCENE-8398.patch
          1 kB
          Erick Erickson
        2. LUCENE-8398.patch
          2 kB
          Erick Erickson

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            erickerickson Erick Erickson
            erickerickson Erick Erickson
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            Dates

              Created:
              Updated:
              Resolved: