用JBossTools生成项目，生成CRUD的代码，然后访问就报了如下异常：

Exception during request processing:

Caused by java.lang.IllegalStateException with message: "No phase id bound to current thread (make sure you do not have two SeamPhaseListener instances installed)"

org.jboss.seam.contexts.PageContext.getPhaseId(PageContext.java:163)
org.jboss.seam.contexts.PageContext.isBeforeInvokeApplicationPhase(PageContext.java:175)
org.jboss.seam.contexts.PageContext.getCurrentWritableMap(PageContext.java:91)
org.jboss.seam.contexts.PageContext.remove(PageContext.java:105)
org.jboss.seam.Component.newInstance(Component.java:2102)
org.jboss.seam.Component.getInstance(Component.java:1987)
org.jboss.seam.Component.getInstance(Component.java:1966)
org.jboss.seam.Component.getInstance(Component.java:1960)
org.jboss.seam.Component.getInstance(Component.java:1933)
org.jboss.seam.Component.getInstance(Component.java:1928)
org.jboss.seam.faces.FacesPage.instance(FacesPage.java:92)
org.jboss.seam.core.ConversationPropagation.restorePageContextConversationId(ConversationPropagation.java:84)
org.jboss.seam.core.ConversationPropagation.restoreConversationId(ConversationPropagation.java:57)
org.jboss.seam.jsf.SeamPhaseListener.afterRestoreView(SeamPhaseListener.java:389)
org.jboss.seam.jsf.SeamPhaseListener.afterServletPhase(SeamPhaseListener.java:228)
org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.java:194)
com.sun.faces.lifecycle.Phase.handleAfterPhase(Phase.java:175)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:114)
com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:104)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:54)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
java.lang.Thread.run(Thread.java:619)

Google了一下，有人讲是JBoss4.2.3GA版本的BUG，赶紧下载了JBoss4.2.2GA，再测试一切正常！

不知还会不会有其它莫名的BUG了......