Weichen Xu created SPARK-22111:
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             Summary: OnlineLDAOptimizer should filter out empty documents 
beforehand 
                 Key: SPARK-22111
                 URL: https://issues.apache.org/jira/browse/SPARK-22111
             Project: Spark
          Issue Type: Improvement
          Components: MLlib
    Affects Versions: 2.3.0
            Reporter: Weichen Xu
            Priority: Minor


OnlineLDAOptimizer should filter out empty documents beforehand in order to 
make corpusSize, batchSize, and nonEmptyDocsN all refer to the same filtered 
corpus with all non-empty docs. 



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