ConcurrentModificationException looking up BeanManager ------------------------------------------------------ Key: SOLDER-94 URL: https://issues.jboss.org/browse/SOLDER-94 Project: Seam Solder Issue Type: Bug Components: Core Affects Versions: 3.0.0.CR4 Reporter: Nicklas Karlsson Assignee: Stuart Douglas Priority: Critical Fix For: 3.0.0.Final Sometimes (during browser refresh/redeploy?) I manager to get a java.util.ConcurrentModificationException at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372) at java.util.AbstractList$Itr.next(AbstractList.java:343) at java.util.Collections.sort(Collections.java:162) at org.jboss.seam.solder.beanManager.BeanManagerLocator.lookupBeanManager(BeanManagerLocator.java:134) at org.jboss.seam.solder.beanManager.BeanManagerLocator.getBeanManager(BeanManagerLocator.java:86) at org.jboss.seam.faces.exception.CatchExceptionHandlerFactory.getExceptionHandler(CatchExceptionHandlerFactory.java:48) at com.sun.faces.context.FacesContextFactoryImpl.getFacesContext(FacesContextFactoryImpl.java:94) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:298) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:324) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242) at org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:67) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:274) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242) at org.jboss.seam.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:72) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:274) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242) at org.jboss.seam.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:274) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:181) at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.event(CatalinaContext.java:285) at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.invoke(CatalinaContext.java:261) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:88) at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:100) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:53) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) at Apparently the list changes while sorting? Or something else that would warrant a synchronize block/method?