Problem using JPA on Tomcat

[thomas2004]

Hi all,

I recently read an artcle from Sing Li "Introduction to Spring 2 and JPA" and follow his example step by step. At the end as I try to run my web application on Tomcat I got the following exceptions. These exception come from data access to the database. Since if've I cleared the tables, it's ok. If I fill data into the tables, I got these exceptions.

Could someone give me a hint?


*****

org.springframework.web.util.NestedServletExceptio n: Handler processing failed; nested exception is

java.lang.IllegalAccessError: class sun.reflect.GeneratedConstructorAccessor11 cannot access its superclass

sun.reflect.ConstructorAccessorImpl
org.springframework.web.servlet.DispatcherServlet. doDispatch(DispatcherServlet.java:897)
org.springframework.web.servlet.DispatcherServlet. doService(DispatcherServlet.java:792)
org.springframework.web.servlet.FrameworkServlet.p rocessRequest(FrameworkServlet.java:461)
org.springframework.web.servlet.FrameworkServlet.d oGet(FrameworkServlet.java:416)
javax.servlet.http.HttpServlet.service(HttpServlet .java:689)
javax.servlet.http.HttpServlet.service(HttpServlet .java:802)


root cause

java.lang.IllegalAccessError: class sun.reflect.GeneratedConstructorAccessor11 cannot access its superclass

sun.reflect.ConstructorAccessorImpl
sun.misc.Unsafe.defineClass(Native Method)
sun.reflect.ClassDefiner.defineClass(ClassDefiner. java:45)
sun.reflect.MethodAccessorGenerator$1.run(MethodAc cessorGenerator.java:381)
java.security.AccessController.doPrivileged(Native Method)
sun.reflect.MethodAccessorGenerator.generate(Metho dAccessorGenerator.java:377)
sun.reflect.MethodAccessorGenerator.generateConstr uctor(MethodAccessorGenerator.java:76)
sun.reflect.NativeConstructorAccessorImpl.newInsta nce(NativeConstructorAccessorImpl.java:30)
sun.reflect.DelegatingConstructorAccessorImpl.newI nstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor.newInstance(Construc tor.java:494)
oracle.toplink.essentials.internal.security.Privil egedAccessHelper.invokeConstructor

(PrivilegedAccessHelper.java:311)


oracle.toplink.essentials.internal.descriptors.Ins tantiationPolicy.buildNewInstanceUsingDefaultConst ructor

(InstantiationPolicy.java:152)
oracle.toplink.essentials.internal.descriptors.Ins tantiationPolicy.buildNewInstance

(InstantiationPolicy.java:127)
oracle.toplink.essentials.internal.descriptors.Obj ectBuilder.buildNewInstance(ObjectBuilder.java:340 )
oracle.toplink.essentials.descriptors.copying.Inst antiationCopyPolicy.buildClone

(InstantiationCopyPolicy.java:53)
oracle.toplink.essentials.internal.descriptors.Obj ectBuilder.buildBackupClone(ObjectBuilder.java:313 )
oracle.toplink.essentials.descriptors.changetracki ng.DeferredChangeDetectionPolicy.buildBackupClone

(DeferredChangeDetectionPolicy.java:179)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.populateAndRegisterObject

(UnitOfWorkImpl.java:2853)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.cloneAndRegisterObject(UnitOfWorkImpl.jav a:689)
oracle.toplink.essentials.internal.sessions.UnitOf WorkIdentityMapAccessor.getAndCloneCacheKeyFromPar ent

(UnitOfWorkIdentityMapAccessor.java:168)
oracle.toplink.essentials.internal.sessions.UnitOf WorkIdentityMapAccessor.getFromIdentityMap

(UnitOfWorkIdentityMapAccessor.java:106)
oracle.toplink.essentials.internal.sessions.Identi tyMapAccessor.getFromIdentityMap

(IdentityMapAccessor.java:311)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.registerExistingObject

(UnitOfWorkImpl.java:3091)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.registerExistingObject

(UnitOfWorkImpl.java:3040)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.registerExistingObject

(UnitOfWorkImpl.java:3060)
oracle.toplink.essentials.mappings.ObjectReference Mapping.buildCloneForPartObject

(ObjectReferenceMapping.java:87)
oracle.toplink.essentials.internal.indirection.NoI ndirectionPolicy.cloneAttribute

(NoIndirectionPolicy.java:81)
oracle.toplink.essentials.mappings.ForeignReferenc eMapping.buildClone(ForeignReferenceMapping.java:1 34)
oracle.toplink.essentials.internal.descriptors.Obj ectBuilder.populateAttributesForClone

(ObjectBuilder.java:2175)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.populateAndRegisterObject

(UnitOfWorkImpl.java:2852)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.cloneAndRegisterObject(UnitOfWorkImpl.jav a:689)
oracle.toplink.essentials.internal.sessions.UnitOf WorkIdentityMapAccessor.getAndCloneCacheKeyFromPar ent

(UnitOfWorkIdentityMapAccessor.java:168)
oracle.toplink.essentials.internal.sessions.UnitOf WorkIdentityMapAccessor.getFromIdentityMap

(UnitOfWorkIdentityMapAccessor.java:106)
oracle.toplink.essentials.internal.sessions.Identi tyMapAccessor.getFromIdentityMap

(IdentityMapAccessor.java:311)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.registerExistingObject

(UnitOfWorkImpl.java:3091)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.registerExistingObject

(UnitOfWorkImpl.java:3040)
oracle.toplink.essentials.queryframework.ObjectBui ldingQuery.registerIndividualResult

(ObjectBuildingQuery.java:335)
oracle.toplink.essentials.internal.descriptors.Obj ectBuilder.buildWorkingCopyCloneNormally

(ObjectBuilder.java:457)
oracle.toplink.essentials.internal.descriptors.Obj ectBuilder.buildObjectInUnitOfWork

(ObjectBuilder.java:422)
oracle.toplink.essentials.internal.descriptors.Obj ectBuilder.buildObject(ObjectBuilder.java:388)
oracle.toplink.essentials.queryframework.ReportQue ryResult.processItem(ReportQueryResult.java:221)
oracle.toplink.essentials.queryframework.ReportQue ryResult.buildResult(ReportQueryResult.java:183)
oracle.toplink.essentials.queryframework.ReportQue ryResult.<init>(ReportQueryResult.java:99)
oracle.toplink.essentials.queryframework.ReportQue ry.buildObject(ReportQuery.java:595)
oracle.toplink.essentials.queryframework.ReportQue ry.buildObjects(ReportQuery.java:644)
oracle.toplink.essentials.queryframework.ReportQue ry.executeDatabaseQuery(ReportQuery.java:792)
oracle.toplink.essentials.queryframework.DatabaseQ uery.execute(DatabaseQuery.java:629)
oracle.toplink.essentials.queryframework.ObjectLev elReadQuery.execute(ObjectLevelReadQuery.java:693)
oracle.toplink.essentials.queryframework.ObjectLev elReadQuery.executeInUnitOfWork

(ObjectLevelReadQuery.java:747)
oracle.toplink.essentials.internal.sessions.UnitOf WorkImpl.internalExecuteQuery(UnitOfWorkImpl.java: 2235)
oracle.toplink.essentials.internal.sessions.Abstra ctSession.executeQuery(AbstractSession.java:953)
oracle.toplink.essentials.internal.sessions.Abstra ctSession.executeQuery(AbstractSession.java:925)
oracle.toplink.essentials.internal.ejb.cmp3.base.E JBQueryImpl.executeReadQuery(EJBQueryImpl.java:362 )
oracle.toplink.essentials.internal.ejb.cmp3.base.E JBQueryImpl.getResultList(EJBQueryImpl.java:469)
org.springframework.orm.jpa.JpaTemplate$9.doInJpa( JpaTemplate.java:313)
org.springframework.orm.jpa.JpaTemplate.execute(Jp aTemplate.java:191)
org.springframework.orm.jpa.JpaTemplate.executeFin d(JpaTemplate.java:158)
org.springframework.orm.jpa.JpaTemplate.find(JpaTe mplate.java:305)
org.springframework.orm.jpa.JpaTemplate.find(JpaTe mplate.java:301)
com.ibm.dw.spring2.EmployeeDAO.findAll(EmployeeDAO .java:13)
com.ibm.dw.spring2.web.MainController.handleReques tInternal(MainController.java:20)
org.springframework.web.servlet.mvc.AbstractContro ller.handleRequest(AbstractController.java:153)
org.springframework.web.servlet.mvc.SimpleControll erHandlerAdapter.handle

(SimpleControllerHandlerAdapter.java:48)
org.springframework.web.servlet.DispatcherServlet. doDispatch(DispatcherServlet.java:857)
org.springframework.web.servlet.DispatcherServlet. doService(DispatcherServlet.java:792)
org.springframework.web.servlet.FrameworkServlet.p rocessRequest(FrameworkServlet.java:461)
org.springframework.web.servlet.FrameworkServlet.d oGet(FrameworkServlet.java:416)
javax.servlet.http.HttpServlet.service(HttpServlet .java:689)
javax.servlet.http.HttpServlet.service(HttpServlet .java:802)

[Andrei Stefan]

It helps browsing the forum first, before posting :
http://forum.springframework.org/showthread.php?t=30434

[thomas2004]

It helps browsing the forum first, before posting :
http://forum.springframework.org/showthread.php?t=30434

Nice to get your reply. I did read the link you post (see following). But I can't figure it out. Especially I don't know where andhow to set the parameter.


**********************
Well, finally got it to work.

Trick is to use InstrumentationLoadTimeWeaver along with the following parameter:
-javaagent:<path-to-spring>\dist\weavers\spring-agent.jar

Many thanks ghofmann for helping me figure it out. I owe you one!

Paul

[Andrei Stefan]

http://static.springframework.org/sp...a-setup-lcemfb

[thomas2004]

I've tried change the SimpleLoadTimeWeaver to InstrumentationLoadTimeWeaver. But I got the following error as I deploy my war (TestSpringJpa.war) onto Tomcat.

-------
05.06.2007 05:43:23 org.apache.commons.modeler.Registry registerComponent
SCHWERWIEGEND: Null component Catalina:type=JspMonitor,name=jsp,WebModule=//loca
lhost/TestSpringJpa,J2EEApplication=none,J2EEServer=none

-------

Besides, in Pauls message he said he used the parameter "-javaagent:<path-to-spring>\dist\weavers\spring-agent.jar". What does this mean? I use maven and set all the dependend jars with or inside <dependency/>. Since the spring.jar contains the class "InstrumentationLoadTimeWeaver", I haven't used the spring-agent.jar. It should be ok, right?