Neil Ireson commented on OPENNLP-1017:

When I manually split the training file into separate train/test partitions or 
use the above code to do it programmatically it works fine. However when I use 
the TokenNameFinderCrossValidator class evaluate method it fails with the 
InsufficientTrainingDataException exception as 0 events are read.

> OpenNlp NameFinderCrossValidation gives InsufficientTrainingDataException
> -------------------------------------------------------------------------
>                 Key: OPENNLP-1017
>                 URL: https://issues.apache.org/jira/browse/OPENNLP-1017
>             Project: OpenNLP
>          Issue Type: Bug
>            Reporter: Saurabh Jain
> OpenNlp NameFinderCrossValidation gives InsufficientTrainingDataException.
> With nfold value 3, I tried to cross validate NameFinder training data. After 
> doing a research I got to know that first partition is assinged null data.

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