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java.util.ConcurrentModificationException: 	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)	at java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:384)	at org.hibernate.engine.transaction.internal.SynchronizationRegistryImpl.notifySynchronizationsAfterTransactionCompletion(SynchronizationRegistryImpl.java:78)	at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.sendAfterTransactionCompletionNotifications(TransactionCoordinatorImpl.java:333)	at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.afterTransaction(TransactionCoordinatorImpl.java:145)	at org.hibernate.engine.transaction.synchronization.internal.SynchronizationCallbackCoordinatorImpl.afterCompletion(SynchronizationCallbackCoordinatorImpl.java:126)	at org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization.afterCompletion(RegisteredSynchronization.java:61)	at bitronix.tm.BitronixTransaction.fireAfterCompletionEvent(BitronixTransaction.java:497)	at bitronix.tm.BitronixTransaction.commit(BitronixTransaction.java:244)	at bitronix.tm.BitronixTransactionManager.commit(BitronixTransactionManager.java:120)	at org.springframework.transaction.jta.JtaTransactionManager.doCommit(JtaTransactionManager.java:1010)	at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)	at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)	at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)	at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)	at com.mckesson.dex.ui.administration.users.SiteUserResourceProvider$$EnhancerByCGLIB$$edc43389.save()	at com.mckesson.dex.ui.viewer.AdaptableForm.save(AdaptableForm.java:407)	at com.mckesson.dex.ui.viewer.AdaptableForm.attemptSave(AdaptableForm.java:274)	at com.mckesson.dex.ui.viewer.AdaptableForm$5.buttonClick(AdaptableForm.java:323)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:512)	at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)	at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)	at com.vaadin.ui.Button.fireClick(Button.java:550)	at com.vaadin.ui.Button.changeVariables(Button.java:217)	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1451)	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1399)	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1318)	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:763)	at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:296)	at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)	at com.mckesson.dex.servlet.DexApplicationServlet.service(DexApplicationServlet.java:60)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:550)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)	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 com.mckesson.dex.security.filter.IpAddressAuditFilter.doFilterInternal(IpAddressAuditFilter.java:54)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)	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.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)	at com.mckesson.dex.security.DexConcurrentSessionFilter.doFilter(DexConcurrentSessionFilter.java:92)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:173)	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:484)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:517)	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:229)	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:970)	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:414)	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:187)	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:904)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)	at org.eclipse.jetty.server.Server.handle(Server.java:347)	at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:590)	at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:1071)	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:823)	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:220)	at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:411)	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:535)	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:529)