Exception in thread “main“ java.lang.IllegalArgumentException: http://www.dmg.org/PMML-4_4

为了让java加载sklearn的模型，各种苦头啊。。

Exception in thread "main" java.lang.IllegalArgumentException: http://www.dmg.org/PMML-4_4
	at org.dmg.pmml.Version.forNamespaceURI(Version.java:62)
	at org.jpmml.model.filters.PMMLFilter.updateSource(PMMLFilter.java:121)
	at org.jpmml.model.filters.PMMLFilter.startPrefixMapping(PMMLFilter.java:43)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startNamespaceMapping(AbstractSAXParser.java:2164)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:469)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:374)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:613)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3132)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:852)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:841)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:770)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
	at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:357)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:243)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:214)
	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:140)
	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:123)
	at org.jpmml.model.JAXBUtil.unmarshal(JAXBUtil.java:82)
	at org.jpmml.model.JAXBUtil.unmarshalPMML(JAXBUtil.java:68)
	at org.jpmml.model.PMMLUtil.unmarshal(PMMLUtil.java:35)
	at controller.PmmlFile.predictLrHeart(PmmlFile.java:37)
	at controller.PmmlFile.main(PmmlFile.java:27)

我都没看懂这个报错到底啥意思。

排查过程很艰难:

先是修改依赖版本，得到:

    org.jpmml
    pmml-evaluator
    1.4.13




    org.jpmml
    pmml-evaluator-extension
    1.4.13

Exception in thread "main" java.lang.IllegalArgumentException: PMML namespace URI http://www.dmg.org/PMML-4_4 is not supported
	at org.dmg.pmml.Version.forNamespaceURI(Version.java:69)
	at org.jpmml.model.filters.PMMLFilter.updateSource(PMMLFilter.java:121)
	at org.jpmml.model.filters.PMMLFilter.startPrefixMapping(PMMLFilter.java:43)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startNamespaceMapping(AbstractSAXParser.java:2164)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:469)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:374)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:613)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3132)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:852)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:841)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:770)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
	at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:357)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:243)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:214)
	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:140)
	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:123)
	at org.jpmml.model.JAXBUtil.unmarshal(JAXBUtil.java:55)
	at org.jpmml.model.JAXBUtil.unmarshalPMML(JAXBUtil.java:41)
	at org.jpmml.model.PMMLUtil.unmarshal(PMMLUtil.java:56)
	at controller.PmmlFile.predictLrHeart(PmmlFile.java:37)
	at controller.PmmlFile.main(PmmlFile.java:27)

Process finished with exit code 1