java.io.NotSerializableException: How to debug Java serialization

When you got NotSerializableException and don't know where is problem, there is one solution - switch Java serialization to debug mode.

• Start application with parameter extendedDebugInfo

-Dsun.io.serialization.extendedDebugInfo=true

• Run your serialization routines to reproduce exceptions
• You will get usual exception with debug infromation containing stack of serialization

WARNING: Cannot serialize session attribute com.vaadin.terminal.gwt.server.WebApplicationContext for session 088634D700DB384445C8C941855BD7A9
java.io.NotSerializableException: xx.vaadin.security.SecuredValue
 - field (class "xx.base.view.BaseApplication", name: "goliId", type: "class xx.vaadin.security.SecuredValue")
 - object (class "xx.view.paymentorder.ServletPaymentOrderApplication", xx.view.paymentorder.ServletPaymentOrderApplication@1837b90c)
 - custom writeObject data (class "java.util.HashMap")
 - object (class "java.util.HashMap", {xx.view.paymentorder.ServletPaymentOrderApplication@1837b90c=com.vaadin.terminal.gwt.server.CommunicationManager@3cf94dad})
 - field (class "com.vaadin.terminal.gwt.server.AbstractWebApplicationContext", name: "applicationToAjaxAppMgrMap", type: "class java.util.HashMap")
 - root object (class "com.vaadin.terminal.gwt.server.WebApplicationContext", com.vaadin.terminal.gwt.server.WebApplicationContext@28cc5c6c)
 at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1161)
 at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
 at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
 at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
 at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
 at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
 at java.util.HashMap.writeObject(HashMap.java:1000)
 at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:940)
 at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
 at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
 at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
 at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
 at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
 at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
 at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
 at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
 at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1671)
 at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:1077)
 at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:411)
 at org.apache.catalina.session.StandardManager.unload(StandardManager.java:353)
 at org.apache.catalina.session.StandardManager.stopInternal(StandardManager.java:497)
 at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
 at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5462)
 at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
 at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1581)
 at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1571)
 at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
 at java.util.concurrent.FutureTask.run(FutureTask.java:138)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:662)

How to convert HQL to SQL in Hibernate

If you want to get native SQL from HQL in Hibernate you can use following snippet.

final Query query = sessionFactory.getCurrentSession().createQuery(hql).setParameter(paramName, paramValue);

final QueryTranslatorFactory ast = new ASTQueryTranslatorFactory();
final QueryTranslatorImpl newQueryTranslator = (QueryTranslatorImpl) ast.createQueryTranslator(queryId, query.getQueryString(), Collections.EMPTY_MAP, (SessionFactoryImplementor) sessionFactory);
newQueryTranslator.compile(null, false);
sql = newQueryTranslator.getSQLString();

if (youWantToHaveParametersWithTheirNamesNotWithQuestionMarks) {
 final List parameterSpecifications = newQueryTranslator.getCollectedParameterSpecifications();
 if (!CollectionUtils.isEmpty(parameterSpecifications)) {
  for (NamedParameterSpecification parameter : parameterSpecifications) {
   sql = StringUtils.replaceOnce(sql, "?", ":" + parameter.getName());
  }
 }
}