セッションタイムアウトの30秒後にブラウザウィンドウを更新するフェイスレットがあります。
<a4j:region>
<h:form>
<a4j:poll id="poll" interval="#{(session.maxInactiveInterval + 30)*1000}" onbegin="window.document.location.href='/Patrac'"/>
</h:form>
</a4j:region>
ファセットをリロードすると、SFSBでメソッドが呼び出されます。
<ui:define name="title">PATRAC - #{workflowManager.currentWorkflow.screenTitle}</ui:define>
SFSBはセッションスコープです。
@SessionScoped
@Stateful
public class WorkflowManager {
...
public Workflow getCurrentWorkflow() { return currentWorkflow; }
@PreDestroy public void bye() { System.out.println("Destroying: "+ getClass().getName() +", ID = "+ getId()); }
}
画面が問題なく更新される時間の85%:
15:56:44,951 INFO [stdout] (http-/127.0.0.1:8443-1) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = -1906221148858801782
15:56:44,968 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-1) NoCacheFilter.doFilter() URI: /Patrac/
15:58:01,343 INFO [stdout] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = -3546919396833964128
15:58:15,288 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-3) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
15:58:15,319 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-4) NoCacheFilter.doFilter() URI: /Patrac/
15:58:15,349 WARNING [com.patrac.controller.exceptionhandler.ViewExpiredExceptionHandler] (http-/127.0.0.1:8443-3) Attempt to access an expired view: /index.xhtml from remote host: 127.0.0.1
15:58:15,389 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-4) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
15:59:45,771 INFO [stdout] (http-/127.0.0.1:8443-1) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = -5655846827584878649
15:59:45,777 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-1) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
15:59:45,800 WARNING [com.patrac.controller.exceptionhandler.ViewExpiredExceptionHandler] (http-/127.0.0.1:8443-1) Attempt to access an expired view: /index.xhtml from remote host: 127.0.0.1
15:59:45,890 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-1) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:00:01,356 INFO [stdout] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = 4579100734353654546
16:01:01,363 INFO [stdout] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = 4317425328092070112
16:01:16,518 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-3) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:01:16,526 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-8) NoCacheFilter.doFilter() URI: /Patrac/
16:01:16,544 WARNING [com.patrac.controller.exceptionhandler.ViewExpiredExceptionHandler] (http-/127.0.0.1:8443-3) Attempt to access an expired view: /index.xhtml from remote host: 127.0.0.1
16:01:16,572 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-3) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:02:46,894 INFO [stdout] (http-/127.0.0.1:8443-1) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = 7360031599060690367
16:02:46,900 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-1) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:02:46,923 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-6) NoCacheFilter.doFilter() URI: /Patrac/
16:02:46,950 WARNING [com.patrac.controller.exceptionhandler.ViewExpiredExceptionHandler] (http-/127.0.0.1:8443-1) Attempt to access an expired view: /index.xhtml from remote host: 127.0.0.1
16:02:46,975 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-1) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:03:01,380 INFO [stdout] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = -5741388414554084710
16:04:01,389 INFO [stdout] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = -1149102875316717372
16:04:01,395 INFO [stdout] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = -7198492156368620025
16:04:17,355 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-7) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:04:17,365 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-8) NoCacheFilter.doFilter() URI: /Patrac/
16:04:17,405 WARNING [com.patrac.controller.exceptionhandler.ViewExpiredExceptionHandler] (http-/127.0.0.1:8443-7) Attempt to access an expired view: /index.xhtml from remote host: 127.0.0.1
16:04:17,460 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-8) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:05:47,769 INFO [stdout] (http-/127.0.0.1:8443-7) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = -8106288024707282506
16:05:47,773 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-7) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:05:47,808 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-6) NoCacheFilter.doFilter() URI: /Patrac/
16:05:47,809 WARNING [com.patrac.controller.exceptionhandler.ViewExpiredExceptionHandler] (http-/127.0.0.1:8443-7) Attempt to access an expired view: /index.xhtml from remote host: 127.0.0.1
16:05:47,856 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-7) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:06:01,409 INFO [stdout] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = 6737131848251158629
16:07:01,419 INFO [stdout] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = -3248726216386741006
16:07:01,423 INFO [stdout] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = -7798326820709515585
16:07:18,188 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-8) NoCacheFilter.doFilter() URI: /Patrac/
16:07:18,188 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-1) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:07:18,219 WARNING [com.patrac.controller.exceptionhandler.ViewExpiredExceptionHandler] (http-/127.0.0.1:8443-1) Attempt to access an expired view: /index.xhtml from remote host: 127.0.0.1
16:07:18,250 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-1) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
ただし、次のことが発生する場合があります。
16:08:48,536 INFO [stdout] (http-/127.0.0.1:8443-7) Destroying: com.patrac.controller.statemachine.WorkflowManager, ID = 601708170643229812
16:08:48,537 INFO [com.patrac.filter.NoCacheFilter] (http-/127.0.0.1:8443-7) NoCacheFilter.doFilter() URI: /Patrac/index.xhtml
16:08:48,540 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host]] (http-/127.0.0.1:8443-3) Exception sending request initialized lifecycle event to listener instance of class org.jboss.weld.servlet.WeldListener: javax.ejb.NoSuchEJBException: JBAS016055: EJB has been removed
at org.jboss.as.weld.ejb.StatefulSessionObjectReferenceImpl.getBusinessObject(StatefulSessionObjectReferenceImpl.java:124) [jboss-as-weld-7.2.0.Alpha1-SNAPSHOT.jar:7.2.0.Alpha1-SNAPSHOT]
at org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:108) [weld-core-1.1.9.Final.jar:2012-08-06 19:12]
at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56) [weld-core-1.1.9.Final.jar:2012-08-06 19:12]
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105) [weld-core-1.1.9.Final.jar:2012-08-06 19:12]
at com.patrac.controller.statemachine.WorkflowManager$Proxy$_$$_Weld$Proxy$.toString(WorkflowManager$Proxy$_$$_Weld$Proxy$.java) [Patrac-ejb.jar:]
at java.lang.String.valueOf(String.java:2854) [rt.jar:1.7.0_07]
at java.lang.StringBuilder.append(StringBuilder.java:128) [rt.jar:1.7.0_07]
at org.jboss.weld.context.SerializableContextualInstanceImpl.toString(SerializableContextualInstanceImpl.java:60) [weld-core-1.1.9.Final.jar:2012-08-06 19:12]
at java.lang.String.valueOf(String.java:2854) [rt.jar:1.7.0_07]
at java.lang.StringBuilder.append(StringBuilder.java:128) [rt.jar:1.7.0_07]
at org.jboss.weld.context.beanstore.AttributeBeanStore.attach(AttributeBeanStore.java:109) [weld-core-1.1.9.Final.jar:2012-08-06 19:12]
at org.jboss.weld.context.AbstractBoundContext.activate(AbstractBoundContext.java:66) [weld-core-1.1.9.Final.jar:2012-08-06 19:12]
at org.jboss.weld.servlet.WeldListener.requestInitialized(WeldListener.java:141) [weld-core-1.1.9.Final.jar:2012-08-06 19:12]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:372) [jbossweb-7.0.17.Final.jar:]
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:897) [jbossweb-7.0.17.Final.jar:]
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:634) [jbossweb-7.0.17.Final.jar:]
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2039) [jbossweb-7.0.17.Final.jar:]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_07]
16:08:48,561 WARNING [com.patrac.controller.exceptionhandler.ViewExpiredExceptionHandler] (http-/127.0.0.1:8443-7) Attempt to access an expired view: /index.xhtml from remote host: 127.0.0.1
スタックトレースは常にブラウザウィンドウに表示されるため、これは、セッションがタイムアウトしたときにブラウザがリクエストを行った後に発生します。これは、SFSBが破棄されるのとほぼ同時に(ミリ秒以内に)要求が受信された場合にのみ発生します。ログアウト時に発生することはありませんが、302 REDIRECTを使用すると、SFSBが破棄されてからわずか数ミリ秒後にブラウザがリクエストを送信します。タイミングが要因であるだけでなく、これが発生するたびにViewExpiredExceptionがスローされるようです。
セッションがタイムアウトしたがEJBがすぐに削除されなかったため、ブラウザがリクエストを行うと、JBossがタイムアウトしたセッションからEJBを削除し、EJBが最初ではなく削除されたという例外をスローしたようです。新しいEJBを作成し、それを新しいセッションにバインドします。
NoSuchEJBExceptionを処理するにはどうすればよいですか、それとも完全に回避するにはどうすればよいですか?