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https://issues.apache.org/jira/browse/LUCENE-7950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16151496#comment-16151496
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ASF subversion and git services commented on LUCENE-7950:
---------------------------------------------------------

Commit c2c2e8a85e92024d627381858cd1dbcff4cbab72 in lucene-solr's branch 
refs/heads/master from [~teofili]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=c2c2e8a ]

LUCENE-7950 - fixed potential NPE when no docs have the class field


> SimpleNaiveBayesDocumentClassifier throws NPE if no docs have the class field
> -----------------------------------------------------------------------------
>
>                 Key: LUCENE-7950
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7950
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/classification
>            Reporter: Tommaso Teofili
>            Assignee: Tommaso Teofili
>             Fix For: 7.1
>
>
> As discussed on the solr-user@ list the SNBDC throws a NPE as the potential 
> _null_ value resulting from _MultiFields.getTerms(indexReader, 
> classFieldName)_ is not properly handled.



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