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https://issues.apache.org/jira/browse/LUCENE-7274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15849629#comment-15849629
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Cao Manh Dat commented on LUCENE-7274:
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[~teofili] After review the patch, I'm afraid that we should close this issue
as won't fix.
Because all classifiers in classification module are lazy learning methods and
relied on Lucene to quickly classify documents. They don't have any pre-trained
model. Logistic Regression in other way is eager learning method, so It need a
pre-trained model to classify documents. But the patch did not provide an api
to train a logistic regression model, so it will be hard for users to use
{{LogisticRegressionDocumentClassifier}}.
BTW SOLR-8492 and SOLR-9252 provide an api for training a model. The trained
model will be stored as a document in Lucene index. So it will make Lucene
depend on how Solr construct that model, but I don't think it will be a good
idea.
So I think we can close this issue and create another issue like "an unify api
for eager learning method in classification module"
> Add LogisticRegressionDocumentClassifier
> ----------------------------------------
>
> Key: LUCENE-7274
> URL: https://issues.apache.org/jira/browse/LUCENE-7274
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/classification
> Reporter: Cao Manh Dat
> Assignee: Tommaso Teofili
> Attachments: LUCENE-7274.patch
>
>
> Add LogisticRegressionDocumentClassifier for Lucene.
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