When I stop my server I get this exception:
SEVERE: Exception loading sessions from persistent storage
java.lang.IllegalStateException: Cannot deserialize BeanFactory with id org.springframework.web.context.WebApplicationContext:/Life: no factory registered for this id
at org.springframework.beans.factory.support.DefaultListableBeanFactory$SerializedBeanFactoryReference.readResolve(DefaultListableBeanFactory.java:953)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeReadResolve(Unknown Source)
Why is that?
My guess: when spring beans are serialized (for example, as part of the http session), on restoring spring tries not to restore their original values (since they might be meaningless after the deserialization), but instead tries to fetch them by their id. If you have changed your bean definitions and have removed the bean in question, and spring tries to deserialize it (from where it has serialized it, under circumstances which I don't know based on the information given), it would throw the exception that no such bean exists.
Related
As a database we use PostgreSQL. Application uses spring libraries, and transaction is managed by spring. Transactional annotation is used correctly, where it is needed as read-only, and where it is used with write abilities. But in logs we occasinally see exception
2020-12-30 11:39:13.513 [jmsContainer-8] ERROR o.h.e.jdbc.spi.SqlExceptionHelper - ERROR: cannot execute nextval() in a read-only transaction
2020-12-30 11:39:13.515 [jmsContainer-8] ERROR o.s.t.s.TransactionSynchronizationUtils - TransactionSynchronization.afterCompletion threw exception
javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not extract ResultSet
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:147)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:155)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:162)
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:780)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:758)
at jdk.internal.reflect.GeneratedMethodAccessor2794.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:301)
at com.sun.proxy.$Proxy226.persist(Unknown Source)
Connections to PostgreSQL is provided through pg_bouncer, and pool_mode=sesssion, the server_reset_query=DISCARD ALL.
We tried restarting the pg_bouncer, though maybe some connection by default set read-only and being kept alive, but it did not help.
Any thoughts?
i am trying to connect db2 from my java code in web sphere application server.
i am getting following exception.please suggest any one on this.
Caused by: com.ibm.websphere.naming.CannotInstantiateObjectException: Exception occurred while the JNDI NamingManager was processing a javax.naming.Reference object. [Root exception is javax.xml.stream.FactoryConfigurationError: Provider javax.xml.stream.XMLInputFactory could not be instantiated: java.util.ServiceConfigurationError: javax.xml.stream.XMLInputFactory: Provider com.sun.xml.internal.stream.XMLInputFactoryImpl not a subtype] at com.ibm.ws.naming.util.Helpers.processSerializedObjectForLookupExt(Helpers.java:1232) at com.ibm.ws.naming.util.Helpers.processSerializedObjectForLookup(Helpers.java:925) at com.ibm.ws.naming.jndicos.CNContextImpl.processBoundObjectForLookup(CNContextImpl.java:2877) at com.ibm.ws.naming.jndicos.CNContextImpl.processResolveResults(CNContextImpl.java:3974) at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1876) at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1777) at com.ibm.ws.naming.jndicos.CNContextImpl.lookupExt(CNContextImpl.java:1434) at com.ibm.ws.naming.jndicos.CNContextImpl.lookup(CNContextImpl.java:616) at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:165) at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:179) at org.apache.aries.jndi.DelegateContext.lookup(DelegateContext.java:161) at javax.naming.InitialContext.lookup(InitialContext.java:428) at com.deere.u90.iaf.jdbc.connection.ConnectionManager.initializeEnvironment(ConnectionManager.java:276) ... 38 more Caused by: javax.xml.stream.FactoryConfigurationError: Provider javax.xml.stream.XMLInputFactory could not be instantiated: java.util.ServiceConfigurationError: javax.xml.stream.XMLInputFactory: Provider com.sun.xml.internal.stream.XMLInputFactoryImpl not a subtype at javax.xml.stream.XMLInputFactory.newFactory(Unknown Source) at javax.xml.stream.XMLInputFactory.newInstance(Unknown Source) at com.ibm.websphere.product.metadata.im.IMMetadata.setHistoryEventsFromHistoryXml(IMMetadata.java:745) at com.ibm.websphere.product.metadata.im.IMMetadata.parseHistoryXmlFile(IMMetadata.java:587) at com.ibm.websphere.product.metadata.im.IMMetadata.parseInstallRegistryFiles(IMMetadata.java:399) at com.ibm.websphere.product.metadata.im.IMMetadata.(IMMetadata.java:269) at com.ibm.websphere.product.metadata.im.IMMetadata.getIMMetadataInstance(IMMetadata.java:133) at com.ibm.websphere.product.metadata.WASMetadata.parseMetadataFiles(WASMetadata.java:939) at com.ibm.websphere.product.metadata.WASMetadata.(WASMetadata.java:784) at com.ibm.websphere.product.metadata.WASMetadata.getWASMetadataInstance(WASMetadata.java:215) at com.ibm.websphere.product.WASDirectory.initMetadataInstance(WASDirectory.java:1415) at com.ibm.websphere.product.WASDirectory.getIMLogLocation(WASDirectory.java:435) at com.ibm.websphere.product.VersionInfo.printSource(VersionInfo.java:1534) at com.ibm.websphere.product.VersionInfo.printReport(VersionInfo.java:1322) at com.ibm.websphere.product.VersionInfo.runReport(VersionInfo.java:1064) at com.ibm.websphere.product.VersionInfo.runReport(VersionInfo.java:1025) at com.ibm.ws.rsadapter.spi.ServerFunction$7.run(ServerFunction.java:596) at com.ibm.ws.rsadapter.spi.ServerFunction$7.run(ServerFunction.java:590) at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118) at com.ibm.ws.rsadapter.spi.ServerFunction.getServerVersion(ServerFunction.java:588) at com.ibm.ws.rsadapter.spi.WSManagedConnectionFactoryImpl.(WSManagedConnectionFactoryImpl.java:748) at java.lang.J9VMInternals.newInstanceImpl(Native Method) at java.lang.Class.newInstance(Class.java:1899) at com.ibm.ejs.j2c.J2CUtilityClass.createMCFEntry(J2CUtilityClass.java:468) at com.ibm.ejs.j2c.ConnectionFactoryBuilderServerImpl.createMCFandPM(ConnectionFactoryBuilderServerImpl.java:592) at com.ibm.ejs.j2c.ConnectionFactoryBuilderServerImpl.processObjectInstance(ConnectionFactoryBuilderServerImpl.java:1185) at com.ibm.ejs.j2c.ServerFunction.processObjectInstance(ServerFunction.java:2009) at com.ibm.ejs.j2c.ConnectionFactoryBuilderImpl.getObjectInstance(ConnectionFactoryBuilderImpl.java:662) at org.apache.aries.jndi.ObjectFactoryHelper.getObjectInstanceUsingObjectFactoryBuilders(ObjectFactoryHelper.java:349) at org.apache.aries.jndi.ObjectFactoryHelper.getObjectInstance(ObjectFactoryHelper.java:89) at org.apache.aries.jndi.OSGiObjectFactoryBuilder.getObjectInstance(OSGiObjectFactoryBuilder.java:62) at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:311) at com.ibm.ws.naming.util.Helpers.processSerializedObjectForLookupExt(Helpers.java:1122) ... 50 more
I was facing the same issue and here was my resolution
I had wrongly spelled my jta data source in IBM Admin Console and was using a different name in my persistence xml so Websphere couldn't connect.
Please check the Resources Tab in the Admin Console and validate your jta data source name as declared in persistence xml
I now use the newly Grails version 3.0.4, when I set a controller variable with a session value my application does not run.
My controller class:
class AppSecController {
def sessionObject = SessionVars.mySessionObject()
}
I was used this way to get session values on controller vars in older grails versions, and this run successfully, but in Grails 3.0.4 it doesn't works.
The sessioned vars are defined on before() method from an initial Interceptor.
The error stack:
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.company.core.security.AppSecController': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.company.core.security.AppSecController]: Constructor threw exception; nested exception is java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1101)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at grails.boot.GrailsApp.run(GrailsApp.groovy:52)
at grails.boot.GrailsApp.run(GrailsApp.groovy:322)
at grails.boot.GrailsApp.run(GrailsApp.groovy:311)
at grails.boot.GrailsApp$run.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133)
at core.Application.main(Application.groovy:27)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.company.core.security.AppSecController]: Constructor threw exception; nested exception is java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163)
at org.grails.spring.beans.factory.OptimizedAutowireCapableBeanFactory$1.instantiate(OptimizedAutowireCapableBeanFactory.java:89)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1094)
... 21 more
Caused by: java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.
at org.springframework.web.context.request.RequestContextHolder.currentRequestAttributes(RequestContextHolder.java:131)
at org.springframework.web.context.request.RequestContextHolder$currentRequestAttributes.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
at com.company.core.SessionHandler.getSession(SessionHandler.groovy:19)
at com.company.core.SessionHandler.getVar(SessionHandler.groovy:31)
at com.company.core.SessionHandler$getVar$0.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
at com.company.core.security.SessionVars.mySessionObject(SessionVars.groovy:40)
at com.company.core.security.SessionVars$mySessionObject.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
at com.company.core.security.AppSecController.<init>(AppSecController.groovy:10)
at com.company.core.security.AppSecController.<init>(AppSecController.groovy)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
Please if anyone has been able to directly session objects on controller vars. Thanks.
Controllers are be default singleton this means only one exists for the whole application and is created at startup time, hence you cannot access session variables.
One option is to change the scope to prototype, this will create a new controller for each request. In your controller class define:
static scope = 'prototype'
I am new to SDN, I am trying to do a cross store persistence with hibernate. The tutorial given in website has examples for the same, I have checked the github ones too. I have two questions
I am unable to do xml configuration as mentioned in the docs or examples. <neo4j:config/> doesn't support entityManagerFactory. My assumption is it creates the default Neo4jConfiguration which doesn't have a setter for entityManagerFactory. The workaround i have found is to define a CrossStoreNeo4jConfiguration bean.
#Bean
public CrossStoreNeo4jConfiguration crossStoreNeo4jConfiguration(){
CrossStoreNeo4jConfiguration configuration = new CrossStoreNeo4jConfiguration();
configuration.setEntityManagerFactory(entityManagerFactory);
configuration.setGraphDatabaseService(graphDatabaseService);
return configuration;
}
How to do this inside<neo4j:config/>
What happens when you refer a Neo4jTemplate to your repository using neo4j-template-ref when you define repositories using neo4j:repositories? what is the purpose?
UDPATE
The reason it was unable to create CrossStoreNeo4jConfiguration with <neo4j:config/> was , i was missing the dependency spring-data-neo4j-cross-store`. But now i get exception on application start up.
Caused by: java.lang.IllegalStateException: Singleton 'nodeEntityStateFactory' isn't currently in creation
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.afterSingletonCreation(DefaultSingletonBeanRegistry.java:312)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:239)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:292)
at org.springframework.data.neo4j.cross_store.config.CrossStoreNeo4jConfiguration$$EnhancerByCGLIB$$779c5955.nodeEntityStateFactory(<generated>)
at org.springframework.data.neo4j.config.Neo4jConfiguration.mappingContext(Neo4jConfiguration.java:199)
at org.springframework.data.neo4j.cross_store.config.CrossStoreNeo4jConfiguration$$EnhancerByCGLIB$$779c5955.CGLIB$mappingContext$11(<generated>)
at org.springframework.data.neo4j.cross_store.config.CrossStoreNeo4jConfiguration$$EnhancerByCGLIB$$779c5955$$FastClassByCGLIB$$3134c8a8.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:280)
at org.springframework.data.neo4j.cross_store.config.CrossStoreNeo4jConfiguration$$EnhancerByCGLIB$$779c5955.mappingContext(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:149)
Thanks in advance.
This should work:
<neo4j:config entityManagerFactory="entityManagerFactory"/>
No need to create your custom implementation.
The template passed to the repository config is the one used by its infrastructure. In most cases there is no need to configure something different.
I am using Spring + JPA + Hibernate in my project.
The project is structured as below:
- DAO layer - responsible to get data. DAO returns data in form of Model objects.
- Service layer - Calls DAO and processes/transforms the (Model) data in form required by UI.
I am using #Transactional for methods on Service layer.
I am facing problem where sometimes I get "Session is closed" error while reading data from a Lazily loaded collection.
Also I am not facing this problem consistently.
I get this error sometimes while running from TestNG tests and also when the application is deployed as WAR.
I am pasting the exception I get while running the TestNG tests:
org.hibernate.SessionException: Session is closed!
at org.hibernate.impl.AbstractSessionImpl.errorIfClosed(AbstractSessionImpl.java:72)
at org.hibernate.impl.SessionImpl.getBatcher(SessionImpl.java:305)
at org.hibernate.loader.Loader.doQuery(Loader.java:854)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274)
at org.hibernate.loader.Loader.loadEntity(Loader.java:2037)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:86)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:76)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3268)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:496)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:477)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:227)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:147)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1090)
at org.hibernate.impl.SessionImpl.immediateLoad(SessionImpl.java:1026)
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:176)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:215)
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190)
at com.applications.qi.etplugin.et.model.impl.ETTestCasePackage_$$_javassist_21.getVertical(ETTestCasePackage_$$_javassist_21.java)
at com.applications.qi.etplugin.et.model.impl.ETTestCasePackage.getVertical(ETTestCasePackage.java:78)
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.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:197)
at com.applications.qi.etplugin.et.model.impl.ETTestCasePackage_$$_javassist_21.getVertical(ETTestCasePackage_$$_javassist_21.java)
at com.applications.qi.etplugin.et.dao.impl.TestCaseDAOTest.Test2(TestCaseDAOTest.java:62)
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.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
at org.testng.internal.MethodInvocationHelper$1.runTestMethod(MethodInvocationHelper.java:182)
at org.springframework.test.context.testng.AbstractTestNGSpringContextTests.run(AbstractTestNGSpringContextTests.java:158)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.testng.internal.MethodInvocationHelper.invokeHookable(MethodInvocationHelper.java:194)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:695)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:894)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1219)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
This is my first project using Spring / JPA / Hibernate.
I am not able to find out what may be causing this problem?
Also what can be done to resolve this problem?
Please let me if some more information is required.
Any help / pointers are highly appreciated :)
When you are fetching Lazy objects you receives proxy objects instead of real one.
This is probably happened because you are trying to access not initiated Proxy object after your Transaction finished and session closed.
I believe you need to consider on of two options:
Seriously review your Transaction boundaries, and make sure that all your object operation happens inside those transaction boundaries. It will be something like "Open Session In View" design pattern.
Make all your collections EAGER. In that case you will receive a lot of unnecessary database queries.
Hope it helps.