[jboss-user] [JBoss Seam] - Statefull problem: java.lang.NullPointerException

Hi, I am new to @Stateful. Before I have using the POJO Seam components. But now when I'm using the EJB3 I have problem with java.lang.NullPointerException. When I access page after throwed exception again, all is working. But I don't know where is the problem. Thansk Mila Here is code: | javax.servlet.ServletException | at javax.faces.webapp.FacesServlet.service(FacesServlet.java:156) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63) | at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:60) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:53) | at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:96) | at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:220) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) | at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870) | at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) | at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) | at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) | at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685) | at java.lang.Thread.run(Thread.java:595) | 17:44:00,578 ERROR [ExceptionFilter] exception root cause | java.lang.NullPointerException | at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98) | at $Proxy0.initAttachements(Unknown Source) | 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:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:20) | at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31) | at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:72) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57) | at org.jboss.seam.interceptors.SecurityInterceptor.aroundInvoke(SecurityInterceptor.java:37) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.interceptors.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:40) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103) | at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:50) | at org.javassist.tmp.java.lang.Object_$$_javassist_0.initAttachements(Object_$$_javassist_0.java) | 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:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:20) | at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:123) | at org.jboss.seam.Component.callComponentMethod(Component.java:1834) | at org.jboss.seam.Component.getInstanceFromFactory(Component.java:1696) | at org.jboss.seam.Component.getInstance(Component.java:1633) | at org.jboss.seam.Component.getInstance(Component.java:1610) | at org.jboss.seam.jsf.SeamVariableResolver.resolveVariable(SeamVariableResolver.java:53) | at org.apache.myfaces.config.LastVariableResolverInChain.resolveVariable(LastVariableResolverInChain.java:42) | at com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:134) | at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:73) | at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:195) | at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71) | at com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.java:56) | at javax.faces.component.UIData.getValue(UIData.java:1019) | at javax.faces.component.UIData.createDataModel(UIData.java:785) | at javax.faces.component.UIData.getDataModel(UIData.java:765) | at javax.faces.component.UIData.getRowCount(UIData.java:191) | at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.encodeInnerHtml(HtmlTableRendererBase.java:210) | at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.encodeChildren(HtmlTableRendererBase.java:123) | at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:524) | at org.ajax4jsf.framework.renderer.RendererBase.renderChild(RendererBase.java:282) | at org.ajax4jsf.framework.renderer.RendererBase.renderChildren(RendererBase.java:262) | at org.ajax4jsf.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRenderer.java:79) | at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:524) | at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:244) | at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:249) | at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:249) | at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:573) | at org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108) | at org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:229) | at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384) | at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63) | at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:60) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:53) | at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:96) | at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:220) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) | at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870) | at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) | at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) | at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) | at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685) | at java.lang.Thread.run(Thread.java:595) | 17:44:00,609 ERROR [DebugPageHandler] redirecting to debug page | java.lang.NullPointerException | at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98) | at $Proxy0.initAttachements(Unknown Source) | 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:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:20) | at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31) | at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:72) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57) | at org.jboss.seam.interceptors.SecurityInterceptor.aroundInvoke(SecurityInterceptor.java:37) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.interceptors.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:40) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103) | at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:50) | at org.javassist.tmp.java.lang.Object_$$_javassist_0.initAttachements(Object_$$_javassist_0.java) | 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:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:20) | at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:123) | at org.jboss.seam.Component.callComponentMethod(Component.java:1834) | at org.jboss.seam.Component.getInstanceFromFactory(Component.java:1696) | at org.jboss.seam.Component.getInstance(Component.java:1633) | at org.jboss.seam.Component.getInstance(Component.java:1610) | at org.jboss.seam.jsf.SeamVariableResolver.resolveVariable(SeamVariableResolver.java:53) | at org.apache.myfaces.config.LastVariableResolverInChain.resolveVariable(LastVariableResolverInChain.java:42) | at com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:134) | at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:73) | at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:195) | at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71) | at com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.java:56) | at javax.faces.component.UIData.getValue(UIData.java:1019) | at javax.faces.component.UIData.createDataModel(UIData.java:785) | at javax.faces.component.UIData.getDataModel(UIData.java:765) | at javax.faces.component.UIData.getRowCount(UIData.java:191) | at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.encodeInnerHtml(HtmlTableRendererBase.java:210) | at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.encodeChildren(HtmlTableRendererBase.java:123) | at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:524) | at org.ajax4jsf.framework.renderer.RendererBase.renderChild(RendererBase.java:282) | at org.ajax4jsf.framework.renderer.RendererBase.renderChildren(RendererBase.java:262) | at org.ajax4jsf.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRenderer.java:79) | at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:524) | at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:244) | at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:249) | at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:249) | at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:573) | at org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108) | at org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:229) | at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384) | at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63) | at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:60) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:53) | at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49) | at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:96) | at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:220) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) | at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870) | at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) | at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) | at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) | at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685) | at java.lang.Thread.run(Thread.java:595) | 18.7.2007 17:44:01 com.sun.facelets.compiler.TagLibraryConfig loadImplicit | INFO: Added Library from: jar:file:/D:/Programs/tomcat2/webapps/ims/WEB-INF/lib/jsf-facelets.jar!/META-INF/jsf-html.taglib.xml | 18.7.2007 17:44:01 com.sun.facelets.compiler.TagLibraryConfig loadImplicit | INFO: Added Library from: jar:file:/D:/Programs/tomcat2/webapps/ims/WEB-INF/lib/jsf-facelets.jar!/META-INF/jsf-core.taglib.xml | 18.7.2007 17:44:01 com.sun.facelets.compiler.TagLibraryConfig loadImplicit | INFO: Added Library from: jar:file:/D:/Programs/tomcat2/webapps/ims/WEB-INF/lib/richfaces-3.0.1-SNAPSHOT.jar!/META-INF/rich.taglib.xml | 18.7.2007 17:44:01 com.sun.facelets.compiler.TagLibraryConfig loadImplicit | INFO: Added Library from: jar:file:/D:/Programs/tomcat2/webapps/ims/WEB-INF/lib/jboss-seam-pdf.jar!/META-INF/seam-pdf.taglib.xml | 18.7.2007 17:44:01 com.sun.facelets.compiler.TagLibraryConfig loadImplicit | INFO: Added Library from: jar:file:/D:/Programs/tomcat2/webapps/ims/WEB-INF/lib/ajax4jsf-1.1.1-SNAPSHOT.jar!/META-INF/a4j.taglib.xml | 18.7.2007 17:44:01 com.sun.facelets.compiler.TagLibraryConfig loadImplicit | INFO: Added Library from: jar:file:/D:/Programs/tomcat2/webapps/ims/WEB-INF/lib/jsf-facelets.jar!/META-INF/jstl-fn.taglib.xml | 18.7.2007 17:44:01 com.sun.facelets.compiler.TagLibraryConfig loadImplicit | INFO: Added Library from: jar:file:/D:/Programs/tomcat2/webapps/ims/WEB-INF/lib/jsf-facelets.jar!/META-INF/jsf-ui.taglib.xml | 18.7.2007 17:44:01 com.sun.facelets.compiler.TagLibraryConfig loadImplicit | INFO: Added Library from: jar:file:/D:/Programs/tomcat2/webapps/ims/WEB-INF/lib/jboss-seam-ui.jar!/META-INF/seam-ui.taglib.xml | 18.7.2007 17:44:01 com.sun.facelets.compiler.TagLibraryConfig loadImplicit | INFO: Added Library from: jar:file:/D:/Programs/tomcat2/webapps/ims/WEB-INF/lib/jsf-facelets.jar!/META-INF/jstl-core.taglib.xml | | | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4065446#... 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