[prasannarupan]

Hi ,
I tried to get familiar with Hibernate using the example in MyEclipse Hibernate Quickstart guide & I got this error. I’m unable to fix this as I’m new to using Hibernate.

log4j:WARN No appenders could be found for logger (net.sf.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
%%%% Error Creating SessionFactory %%%%
net.sf.hibernate.MappingException: Error reading resource: com/genuitec/hibernate/Bonus.hbm.xml
at net.sf.hibernate.cfg.Configuration.addResource(Configuration.java:339)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:1018)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:974)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:902)
at com.genuitec.hibernate.SessionManager.currentSession(SessionManager.java:48)
at com.genuitec.hibernate.HibernateTest.main(HibernateTest.java:27)
Caused by: net.sf.hibernate.MappingException: invalid mapping
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:287)
at net.sf.hibernate.cfg.Configuration.addResource(Configuration.java:336)
… 5 more
Caused by: org.xml.sax.SAXParseException: The content of element type “class” must match “(meta*,(cache|jcs-cache)?,(id|composite-id),discriminator?,(version|timestamp)?,(property|many-to-one|one-to-one|component|dynamic-component|any|map|set|list|bag|idbag|array|primitive-array)*,(subclass*|joined-subclass*))”.
at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(Unknown Source)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.dom4j.io.SAXReader.read(SAXReader.java:339)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:286)
… 6 more
Exception in thread “main” java.lang.NullPointerException
at com.genuitec.hibernate.SessionManager.currentSession(SessionManager.java:56)
at com.genuitec.hibernate.HibernateTest.main(HibernateTest.java:27)

Somebody please be kind enough to help me.

Thanks
prasanna 😕

[Riyad Kalla]

Chances are when you created the Bonus table you forget to set a primary key, so when you reverse engineer the table, the generated hbm.xml file is getting generated without a <id> field which is required, which is why you are seeing that error.

[prasannarupan]

Hi Riyad,
Thanks Alot for your help. It works fine now.

Regards
prasanna

[Riyad Kalla]

Glad to hear it, thanks for following up.

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