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https://issues.apache.org/jira/browse/OPENNLP-1369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17799335#comment-17799335
]
Martin Wiesner commented on OPENNLP-1369:
-----------------------------------------
As reported "generator.featuregen" is missing in the serialized
pt-pos-perceptron.bin file. Stack trace looks like this:
{quote}java.lang.NullPointerException: Cannot read the array length because "b"
is null
at java.base/java.io.FilterOutputStream.write(FilterOutputStream.java:108)
at
opennlp.tools.util.model.ByteArraySerializer.serialize(ByteArraySerializer.java:36)
at
opennlp.tools.util.model.ByteArraySerializer.serialize(ByteArraySerializer.java:27)
at opennlp.tools.util.model.BaseModel.serialize(BaseModel.java:615)
at
opennlp.tools.util.model.POSModelSerializer.serialize(POSModelSerializer.java:62)
at
opennlp.tools.util.model.POSModelSerializer.serialize(POSModelSerializer.java:33)
at opennlp.tools.util.model.BaseModel.serialize(BaseModel.java:615)
at
opennlp.tools.namefind.TokenNameFinderModelTest.testNERWithPOSModel(TokenNameFinderModelTest.java:102){quote}
> NPE when serializing a TokenNameFinder model trained with
> POSTaggerNameFeatureGeneratorFactory
> ----------------------------------------------------------------------------------------------
>
> Key: OPENNLP-1369
> URL: https://issues.apache.org/jira/browse/OPENNLP-1369
> Project: OpenNLP
> Issue Type: Bug
> Affects Versions: 2.0.0, 2.1.0, 2.2.0, 2.3.0
> Reporter: Lucas Avanço
> Priority: Major
>
> There is an issue of null pointer when trying to serialize a TokenNameFinder
> model trained using as one of feature generators
> POSTaggerNameFeatureGeneratorFactory.
> In this method
> opennlp.tools.util.model.{*}BaseModel#serialize{*}(java.io.OutputStream)
> there is a for which iterates over the artifactMap of the POS-model that must
> be serialized together, but a NPE occurs because *generator.featuregen* is
> not found inside of *pt-pos-perceptron.zip*
>
> <generator
> class="opennlp.tools.util.featuregen.WindowFeatureGeneratorFactory">
> <int name="prevLength">2</int>
> <int name="nextLength">2</int>
> <generator
> class="opennlp.tools.util.featuregen.POSTaggerNameFeatureGeneratorFactory">
> <str name="model">pt-pos-perceptron.zip</str>
> </generator>
> </generator>
>
> This is the POS-tagger model used:
> http://opennlp.sourceforge.net/models-1.5/pt-pos-perceptron.bin
>
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