Occasional no value for key [LocalContainerEntityManagerFactoryBean] on tx commit

[Clarenfield]

This problem pops up intermittently, seemingly randomly on a transaction commit, about 10% of the time.
I'm using version 3.1.0.RELEASE of the Spring stack.
Below are logs of a successful and unsuccessful record save followed by configuration and code details.
Please let me know if I can provide anything else helpful.

Successful Save

DEBUG: org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor - Opening JPA EntityManager in OpenEntityManagerInViewInterceptor
DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Found thread-bound EntityManager [org.hibernate.ejb.EntityManagerImpl@128ef7d] for JPA transaction
DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Creating new transaction with name [com.company.controllers.BusinessObjectController.save]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Exposing JPA transaction as JDBC transaction [org.springframework.orm.jpa.vendor.HibernateJpaDialect$HibernateConnectionHandle@1e956bd]
DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Found thread-bound EntityManager [org.hibernate.ejb.EntityManagerImpl@128ef7d] for JPA transaction
DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Participating in existing transaction
DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Initiating transaction commit
DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Committing JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@128ef7d]
DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Not closing pre-bound JPA EntityManager after transaction
DEBUG: org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor - Closing JPA EntityManager in OpenEntityManagerInViewInterceptor
DEBUG: org.springframework.orm.jpa.EntityManagerFactoryUtils - Closing JPA EntityManager

Unsuccessful Save

DEBUG: org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor - Opening JPA EntityManager in OpenEntityManagerInViewInterceptor
DEBUG: org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler - Starting resource local transaction on application-managed EntityManager [org.hibernate.ejb.EntityManagerImpl@16570ed]
DEBUG: org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler - Joined local transaction
DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Found thread-bound EntityManager [org.hibernate.ejb.EntityManagerImpl@16570ed] for JPA transaction
ERROR: org.springframework.web.servlet.DispatcherServlet - HandlerInterceptor.afterCompletion threw exception
java.lang.IllegalStateException: No value for key [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean@17a6a4b] bound to thread [tomcat-http--50]
	at org.springframework.transaction.support.TransactionSynchronizationManager.unbindResource(TransactionSynchronizationManager.java:209)
	at org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor.afterCompletion(OpenEntityManagerInViewInterceptor.java:107)
	at org.springframework.web.servlet.handler.WebRequestHandlerInterceptorAdapter.afterCompletion(WebRequestHandlerInterceptorAdapter.java:68)
	at org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletion(DispatcherServlet.java:1218)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
	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:304)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:311)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:101)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:182)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:173)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
	at ... cutting off stacktrace due to 10,000 char limit.

Persistence / TX Config:

	<!-- Create a testing embedded HSQL database -->
	<jdbc:embedded-database id="testDataSource" type="H2">
		<jdbc:script location="classpath:test-schema.sql"/>
		<jdbc:script location="classpath:test-data.sql"/>
	</jdbc:embedded-database>
	
	<!-- JPA Config -->
	<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<property name="persistenceUnitName" value="persistenceUnit"/>
		<property name="dataSource" ref="testDataSource"/>
		<property name="jpaVendorAdapter">
	        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
	            <property name="databasePlatform" value="org.hibernate.dialect.SQLServerDialect" />
	            <property name="generateDdl" value="false"/>
	            <property name="showSql" value="false" />
	        </bean>
	    </property>
	</bean>
	
	<!-- JPA Support -->
	<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>
	<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
	
	<!-- Annotation-Driven Transactions -->
	<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
		<property name="entityManagerFactory" ref="entityManagerFactory"/>
	</bean>
	<tx:annotation-driven/>

Relevant service layer code:

@Controller("businessObjectController")
@RequestMapping("/businessObject")
public class BusinessObjectController extends BaseEntityController<BusinessObject> {
	
	@Autowired
	protected BusinessObjectDao dao;
	
	@Transactional
	@SuccessView({"redirect:/businessObject/{businessObject.id}"})
	@RequestMapping(value={"/{id}/edit", "/new"}, method=RequestMethod.POST, params="save")
	public void save(@Valid @ModelAttribute("businessObject") BusinessObject entity) {
		dao.persist(entity);
	}

	... other methods

}

Relevant DAO layer code:

public class GenericDao<T extends BaseEntity<? extends Serializable>> {

	@PersistenceContext
	protected EntityManager entityManager;

	... other methods

	public void persist(T entity) {
		entityManager.persist(entity);
	}
	
	... other methods

}

[Clarenfield]

From the previous logs noticed that there was a referenced ExtendedEntityManagerCreator on the failure.
While debugging noticed that a breakpoint in ExtendedEntityManagerCreator.enlistInCurrentTransa ction() is only hit before a failed persist.
Why would this only be hit on some record save attempts?

The stack looks like

Daemon Thread [tomcat-http--41] (Suspended (breakpoint at line 420 in ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler))	
	ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.enlistInCurrentTransaction() line: 420	
	ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.doJoinTransaction(boolean) line: 398	
	ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(Object, Method, Object[]) line: 350	
	$Proxy47.joinTransaction() line: not available	
	EntityManagerFactoryUtils.doGetTransactionalEntityManager(EntityManagerFactory, Map) line: 179	
	SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(Object, Method, Object[]) line: 211	
	$Proxy47.find(Class, Object) line: not available	
	BusinessObjectDao(GenericDao<T>).load(Serializable) line: 83	
	GenericDao$$FastClassByCGLIB$$e5245179.invoke(int, Object, Object[]) line: not available	
	MethodProxy.invoke(Object, Object[]) line: 204	
	Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint() line: 689	
	Cglib2AopProxy$CglibMethodInvocation(ReflectiveMethodInvocation).proceed() line: 150	
	PersistenceExceptionTranslationInterceptor.invoke(MethodInvocation) line: 155	
	Cglib2AopProxy$CglibMethodInvocation(ReflectiveMethodInvocation).proceed() line: 172	
	Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Object, Method, Object[], MethodProxy) line: 622	
	BusinessObjectDao$$EnhancerByCGLIB$$84f7e87f.load(Serializable) line: not available	
	BusinessObjectController.load(Long) line: 42	
	BusinessObjectController.load(Long) line: 1	
	BusinessObjectController(BaseEntityController<T>).getBindingModel(Long, String) line: 39	
	BaseEntityController$$FastClassByCGLIB$$b9f7d8e9.invoke(int, Object, Object[]) line: not available	
	MethodProxy.invoke(Object, Object[]) line: 204	
	Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Object, Method, Object[], MethodProxy) line: 618	
	BusinessObjectController$$EnhancerByCGLIB$$a399d4d4.getBindingModel(Long, String) line: not available	
	GeneratedMethodAccessor67.invoke(Object, Object[]) line: not available	
	DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25	
	Method.invoke(Object, Object...) line: 597	
	InvocableHandlerMethod.invoke(Object...) line: 212	
	InvocableHandlerMethod.invokeForRequest(NativeWebRequest, ModelAndViewContainer, Object...) line: 126	
	ModelFactory.invokeModelAttributeMethods(NativeWebRequest, ModelAndViewContainer) line: 123	
	ModelFactory.initModel(NativeWebRequest, ModelAndViewContainer, HandlerMethod) line: 97	
	RequestMappingHandlerAdapter.invokeHandlerMethod(HttpServletRequest, HttpServletResponse, HandlerMethod) line: 614	
	RequestMappingHandlerAdapter.handleInternal(HttpServletRequest, HttpServletResponse, HandlerMethod) line: 578	
	RequestMappingHandlerAdapter(AbstractHandlerMethodAdapter).handle(HttpServletRequest, HttpServletResponse, Object) line: 80	
	DispatcherServlet.doDispatch(HttpServletRequest, HttpServletResponse) line: 900	
	DispatcherServlet.doService(HttpServletRequest, HttpServletResponse) line: 827	
	DispatcherServlet(FrameworkServlet).processRequest(HttpServletRequest, HttpServletResponse) line: 882	
	DispatcherServlet(FrameworkServlet).doPost(HttpServletRequest, HttpServletResponse) line: 789	
	DispatcherServlet(HttpServlet).service(HttpServletRequest, HttpServletResponse) line: 641	
	DispatcherServlet(HttpServlet).service(ServletRequest, ServletResponse) line: 722	
	ApplicationFilterChain.internalDoFilter(ServletRequest, ServletResponse) line: 304	
	ApplicationFilterChain.doFilter(ServletRequest, ServletResponse) line: 210	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 311	
	FilterSecurityInterceptor.invoke(FilterInvocation) line: 116	
	FilterSecurityInterceptor.doFilter(ServletRequest, ServletResponse, FilterChain) line: 83	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	ExceptionTranslationFilter.doFilter(ServletRequest, ServletResponse, FilterChain) line: 113	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	SessionManagementFilter.doFilter(ServletRequest, ServletResponse, FilterChain) line: 101	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	AnonymousAuthenticationFilter.doFilter(ServletRequest, ServletResponse, FilterChain) line: 113	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	SecurityContextHolderAwareRequestFilter.doFilter(ServletRequest, ServletResponse, FilterChain) line: 54	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	RequestCacheAwareFilter.doFilter(ServletRequest, ServletResponse, FilterChain) line: 45	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	BasicAuthenticationFilter.doFilter(ServletRequest, ServletResponse, FilterChain) line: 150	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	UsernamePasswordAuthenticationFilter(AbstractAuthenticationProcessingFilter).doFilter(ServletRequest, ServletResponse, FilterChain) line: 182	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	LogoutFilter.doFilter(ServletRequest, ServletResponse, FilterChain) line: 105	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	SecurityContextPersistenceFilter.doFilter(ServletRequest, ServletResponse, FilterChain) line: 87	
	FilterChainProxy$VirtualFilterChain.doFilter(ServletRequest, ServletResponse) line: 323	
	FilterChainProxy.doFilter(ServletRequest, ServletResponse, FilterChain) line: 173	
	DelegatingFilterProxy.invokeDelegate(Filter, ServletRequest, ServletResponse, FilterChain) line: 346	
	DelegatingFilterProxy.doFilter(ServletRequest, ServletResponse, FilterChain) line: 259	
	ApplicationFilterChain.internalDoFilter(ServletRequest, ServletResponse) line: 243	
	ApplicationFilterChain.doFilter(ServletRequest, ServletResponse) line: 210	
	StandardWrapperValve.invoke(Request, Response) line: 224	
	StandardContextValve.invoke(Request, Response) line: 175	
	NonLoginAuthenticator(AuthenticatorBase).invoke(Request, Response) line: 472	
	StandardHostValve.invoke(Request, Response) line: 164	
	ErrorReportValve.invoke(Request, Response) line: 100	
	AccessLogValve.invoke(Request, Response) line: 929	
	StandardEngineValve.invoke(Request, Response) line: 118	
	CoyoteAdapter.service(Request, Response) line: 405	
	Http11Processor.process(SocketWrapper<Socket>) line: 279	
Http11Protocol$Http11ConnectionHandler(AbstractProtocol$AbstractConnectionHandler<S,P>).process(SocketWrapper<S>, SocketStatus) line: 515	
	JIoEndpoint$SocketProcessor.run() line: 302	
	ThreadPoolExecutor$Worker.runTask(Runnable) line: 886	
	ThreadPoolExecutor$Worker.run() line: 908	
	TaskThread(Thread).run() line: 662

[Clarenfield]

Narrowed the replication procedure by removing redirect after save and jamming F5+enter until an exception occurred.
In this case:

org.springframework.transaction.IllegalTransactionStateException: Pre-bound JDBC Connection found! JpaTransactionManager does not support running within DataSourceTransactionManager if told to manage the DataSource itself. It is recommended to use a single JpaTransactionManager for all transactions on a single DataSource, no matter whether JPA or JDBC access.
	at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:356)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)
	at com.company.product.controllers.BusinessObjectController$$EnhancerByCGLIB$$51318fe2.save(<generated>)
	at sun.reflect.GeneratedMethodAccessor81.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:212)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
	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:304)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:311)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:101)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:182)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:173)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:279)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)

[Clarenfield]

It looks like OpenEntityManagerInViewInterceptor is occasionally creating a transaction that doesn't get committed or rolled back:

[09:37:39,896] DEBUG: org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor - Opening JPA EntityManager in OpenEntityManagerInViewInterceptor
[09:37:39,896] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Found thread-bound EntityManager [org.hibernate.ejb.EntityManagerImpl@5170a8] for JPA transaction
[09:37:39,896] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Creating new transaction with name [null]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT
[09:37:39,897] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Exposing JPA transaction as JDBC transaction [org.springframework.orm.jpa.vendor.HibernateJpaDialect$HibernateConnectionHandle@123ef32]
[09:37:39,897] DEBUG: org.compass.spring.transaction.SpringSyncTransaction - Beginning new Spring transaction, and a new compass transaction on thread [tomcat-http--1]
[09:37:39,911] DEBUG: org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor - Closing JPA EntityManager in OpenEntityManagerInViewInterceptor
[09:37:39,911] DEBUG: org.springframework.orm.jpa.EntityManagerFactoryUtils - Closing JPA EntityManager
[09:37:41,705] DEBUG: org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor - Opening JPA EntityManager in OpenEntityManagerInViewInterceptor
[09:37:41,706] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Found thread-bound EntityManager [org.hibernate.ejb.EntityManagerImpl@1acd952] for JPA transaction
[09:37:41,707] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Creating new transaction with name [com.company.product.controllers.BusinessObjectController.load]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''
[09:37:41,707] DEBUG: org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor - Closing JPA EntityManager in OpenEntityManagerInViewInterceptor
[09:37:41,707] DEBUG: org.springframework.orm.jpa.EntityManagerFactoryUtils - Closing JPA EntityManager
Mar 9, 2012 9:37:41 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [appServlet] in context with path [/protosar] threw exception [Request processing failed; nested exception is org.springframework.transaction.IllegalTransactionStateException: Pre-bound JDBC Connection found! JpaTransactionManager does not support running within DataSourceTransactionManager if told to manage the DataSource itself. It is recommended to use a single JpaTransactionManager for all transactions on a single DataSource, no matter whether JPA or JDBC access.]

[Clarenfield]

I was using Compass, which registered a SpringSyncTransactionFactory. Whenever a compass search was performed compass was creating its own transaction in the absence of a spring transaction. But, it still expected the JpaTransactionManager to give it a lifecycle call back on the transaction being committed. Since there wasn't a spring transaction to commit, the compass-created transaction just floated out into the unknown. JPATransactionManager was eventually displeased to find the JDBC transaction that compass bound, and 'splosions followed.

Corrected the issue by annotating my compass search method @Transactional(readOnly=true). Now the compass transaction hooks onto the Spring-managed transaction instead of going rogue.