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https://issues.apache.org/jira/browse/SPARK-5567?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14661961#comment-14661961
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Feynman Liang commented on SPARK-5567:
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It's only implemented on localldamodel so you will need to use the online
optimizer and cast to local model.
> Add prediction methods to LDA
> -----------------------------
>
> Key: SPARK-5567
> URL: https://issues.apache.org/jira/browse/SPARK-5567
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Affects Versions: 1.3.0
> Reporter: Joseph K. Bradley
> Assignee: Feynman Liang
> Fix For: 1.5.0
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> LDA currently supports prediction on the training set. E.g., you can call
> logLikelihood and topicDistributions to get that info for the training data.
> However, it should support the same functionality for new (test) documents.
> This will require inference but should be able to use the same code, with a
> few modification to keep the inferred topics fixed.
> Note: The API for these methods is already in the code but is commented out.
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