Hibernate No of Primery keys

org.hibernate.MappingException: Foreign key (FK42C5E54499629E97:ADPT_GUARANTORTMP [ADPREFNO])) must have same number of columns as the referenced primary key (ADPT_GUARANTORTMP [ADPREFNO,SEQNO])
at org.hibernate.mapping.ForeignKey.alignColumns(ForeignKey.java:113)
at org.hibernate.mapping.ForeignKey.alignColumns(ForeignKey.java:96)
at org.hibernate.cfg.Configuration.secondPassCompileForeignKeys(Configuration.java:1310)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1217)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1333)
at com.maybank.auto.dp.utils.HibernateUtil.<clinit>(HibernateUtil.java:10)
at com.maybank.auto.dp.daos.ApplicationDao.addGuarantor(ApplicationDao.java:278)
at com.maybank.auto.dp.actions.GuarantorAction.execute(GuarantorAction.java:69)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)

HIbernate ID assign

org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save():
at org.hibernate.id.Assigned.generate(Assigned.java:56)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:122)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:117)

Hibernate - java.lang.ExceptionInInitializerError

root cause

java.lang.ExceptionInInitializerError
 com.maybank.auto.dp.utils.HibernateUtil.<clinit>(HibernateUtil.java:14)
 com.maybank.auto.dp.daos.LoginDao.getUserByUserid(LoginDao.java:61)
 com.maybank.auto.dp.actions.LoginAction.execute(LoginAction.java:56)
 org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
 org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
 org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
 org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
 org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
 org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
 org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
 org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
 org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

root cause

java.lang.NumberFormatException: For input string: ""
 java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
 java.lang.Integer.parseInt(Integer.java:470)
 java.lang.Integer.parseInt(Integer.java:499)
 org.hibernate.cfg.HbmBinder.bindColumn(HbmBinder.java:1676)
 org.hibernate.cfg.HbmBinder.bindColumns(HbmBinder.java:1044)
 org.hibernate.cfg.HbmBinder.bindColumnsOrFormula(HbmBinder.java:1547)
 org.hibernate.cfg.HbmBinder.bindSimpleValue(HbmBinder.java:1143)
 org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2102)
 org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2060)
 org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:381)
 org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:295)
 org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:166)
 org.hibernate.cfg.Configuration.add(Configuration.java:716)
 org.hibernate.cfg.Configuration.addInputStream(Configuration.java:551)
 org.hibernate.cfg.Configuration.addResource(Configuration.java:613)
 org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1635)
 org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1603)
 org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1582)
 org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1556)
 org.hibernate.cfg.Configuration.configure(Configuration.java:1476)
 org.hibernate.cfg.Configuration.configure(Configuration.java:1462)
 com.maybank.auto.dp.utils.HibernateUtil.<clinit>(HibernateUtil.java:9)
 com.maybank.auto.dp.daos.LoginDao.getUserByUserid(LoginDao.java:61)
 com.maybank.auto.dp.actions.LoginAction.execute(LoginAction.java:56)
 org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
 org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
 org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
 org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
 org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
 org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
 org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
 org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
 org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

[ERROR] Method invocation failed.
java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.commons.beanutils.PropertyUtilsBean.invokeMethod(PropertyUtilsBean.java:1773)
at org.apache.commons.beanutils.PropertyUtilsBean.setSimpleProperty(PropertyUtilsBean.java:1759)
at org.apache.commons.beanutils.PropertyUtilsBean.setNestedProperty(PropertyUtilsBean.java:1648)
at org.apache.commons.beanutils.PropertyUtilsBean.setProperty(PropertyUtilsBean.java:1677)
at org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:1022)
at org.apache.commons.beanutils.BeanUtilsBean.populate(BeanUtilsBean.java:811)
at org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:298)
at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:467)
at org.apache.struts.chain.commands.servlet.PopulateActionForm.populate(PopulateActionForm.java:50)
at org.apache.struts.chain.commands.AbstractPopulateActionForm.execute(AbstractPopulateActionForm.java:60)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)

Exceptions in java

Definition

An exception is an event, which occurs during the execution of a program, that disrupts the normal flow of the program's instructions.
ex :-

Exception in thread "main" java.io.IOException: Cannot run program "ls": java.io.IOException: error=12, Cannot allocate memory

        at java.lang.ProcessBuilder.start(ProcessBuilder.java:474)
        at java.lang.Runtime.exec(Runtime.java:610)
        at java.lang.Runtime.exec(Runtime.java:448)
        at java.lang.Runtime.exec(Runtime.java:345)
        at prova.main(prova.java:6)
Caused by: java.io.IOException: java.io.IOException: error=12, Cannot allocate memory
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:164)
        at java.lang.ProcessImpl.start(ProcessImpl.java:81)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:467) 

... 4 more

Exception in thread "main" is mention there is an exception after this java.io.IOException: is type of the exception( class) and Cannot run program "ls":  is the root cause of the exception

An exception can occur for many different reasons, including the following:

• A user has entered invalid data.
• A file that needs to be opened cannot be found.
• A network connection has been lost in the middle of communications, or the JVM has run out of memory.

Some of these exceptions are caused by user error, others by programmer error, and others by physical resources that have failed in some manner.

To understand how exception handling works in Java, you need to understand the three categories of exceptions:

• Checked exceptions: A checked exception is an exception that is typically a user error or a problem that cannot be foreseen by the programmer. For example, if a file is to be opened, but the file cannot be found, an exception occurs. These exceptions cannot simply be ignored at the time of compilation.
• Runtime exceptions: A runtime exception is an exception that occurs that probably could have been avoided by the programmer. As opposed to checked exceptions, runtime exceptions are ignored at the time of compliation.
  
  
  exception 

MyEclipse-Struts-config.xml Could not open the editor: An unexpected exception was thrown.

java.lang.NullPointerException
at com.genuitec.eclipse.struts.editor.modeler.model.StrutsConfigDiagram.processAction(StrutsConfigDiagram.java:574)


This error causes to the MyEclipse plugin have some problem to open Struts configuration file. Please restart your IDE.

Could not synchronize database state with session

To overcome this error, you should add this session.flush(); method  at last to your code.