Erro ao instanciar classe - JSF

Front-end
#1

Boa tarde pessoal,

Estou me deparando com um erro no log do catalina onde diz que não é possível instanciar uma classe do meu projeto, porém não é sempre que este erro acontece e gostaria de algumas opiniões/dicas para tentar solucionar.

Vou postar o stack trace para darem uma olhada.


WARNING: javax.faces.FacesException: Cant instantiate class: EntregasMB.. null
javax.faces.FacesException: javax.faces.FacesException: Cant instantiate class: EntregasMB.. null
        at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:537)
        at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:82)
        at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:67)
        at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
        at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:71)
        at org.apache.el.parser.AstValue.getValue(AstValue.java:147)
        at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
        at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
        at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:370)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:993)
        at org.ajax4jsf.component.AjaxViewRoot$1.invokeContextCallback(AjaxViewRoot.java:400)
        at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:240)
        at org.ajax4jsf.component.AjaxViewRoot.processDecodes(AjaxViewRoot.java:417)
        at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:101)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: javax.faces.FacesException: Cant instantiate class: EntregasMB.. null
        at com.sun.faces.config.ManagedBeanFactoryImpl.newInstance(ManagedBeanFactoryImpl.java:282)
        at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:527)
        ... 38 more
Caused by: java.lang.NullPointerException
        at EntregasMB.<init>(EntregasMB.java:49)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at java.lang.Class.newInstance0(Unknown Source)
        at java.lang.Class.newInstance(Unknown Source)
        at com.sun.faces.config.ManagedBeanFactoryImpl.newInstance(ManagedBeanFactoryImpl.java:277)
        ... 39 more
Nov 23, 2011 6:52:22 PM com.sun.faces.lifecycle.LifecycleImpl phase
WARNING: executePhase(APPLY_REQUEST_VALUES 2,com.sun.faces.context.FacesContextImpl@1128ee5) threw exception
javax.faces.FacesException: javax.faces.FacesException: Cant instantiate class: EntregasMB.. null
        at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:109)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: javax.faces.FacesException: javax.faces.FacesException: Cant instantiate class: EntregasMB.. null
        at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:537)
        at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:82)
        at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:67)
        at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
        at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:71)
        at org.apache.el.parser.AstValue.getValue(AstValue.java:147)
        at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
        at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
        at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:370)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:993)
        at org.ajax4jsf.component.AjaxViewRoot$1.invokeContextCallback(AjaxViewRoot.java:400)
        at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:240)
        at org.ajax4jsf.component.AjaxViewRoot.processDecodes(AjaxViewRoot.java:417)
        at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:101)
        ... 25 more
Caused by: javax.faces.FacesException: Cant instantiate class: EntregasMB.. null
        at com.sun.faces.config.ManagedBeanFactoryImpl.newInstance(ManagedBeanFactoryImpl.java:282)
        at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:527)
        ... 38 more
Caused by: java.lang.NullPointerException
        at EntregasMB.<init>(EntregasMB.java:49)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at java.lang.Class.newInstance0(Unknown Source)
        at java.lang.Class.newInstance(Unknown Source)
        at com.sun.faces.config.ManagedBeanFactoryImpl.newInstance(ManagedBeanFactoryImpl.java:277)
        ... 39 more
Nov 23, 2011 6:52:22 PM org.ajax4jsf.webapp.BaseXMLFilter doXmlFilter
SEVERE: Exception in the filter chain
javax.servlet.ServletException: javax.faces.FacesException: Cant instantiate class: EntregasMB.. null
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:256)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: javax.faces.FacesException: javax.faces.FacesException: Cant instantiate class: EntregasMB.. null
        at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:537)
        at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:82)
        at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:67)
        at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
        at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:71)
        at org.apache.el.parser.AstValue.getValue(AstValue.java:147)
        at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
        at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
        at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:370)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:993)
        at org.ajax4jsf.component.AjaxViewRoot$1.invokeContextCallback(AjaxViewRoot.java:400)
        at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:240)
        at org.ajax4jsf.component.AjaxViewRoot.processDecodes(AjaxViewRoot.java:417)
        at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:101)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
        ... 22 more
Caused by: javax.faces.FacesException: Cant instantiate class: EntregasMB.. null
        at com.sun.faces.config.ManagedBeanFactoryImpl.newInstance(ManagedBeanFactoryImpl.java:282)
        at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:527)
        ... 38 more
Caused by: java.lang.NullPointerException
        at EntregasMB.<init>(EntregasMB.java:49)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at java.lang.Class.newInstance0(Unknown Source)
        at java.lang.Class.newInstance(Unknown Source)
        at com.sun.faces.config.ManagedBeanFactoryImpl.newInstance(ManagedBeanFactoryImpl.java:277)
        ... 39 more

Já verifiquei em alguns posts onde diziam para verificar o tipo de escopo no faces-config, verifiquei lá e está como session… O estranho é que outras classes que tenho estão funcionando normalmente.

Abraços,

Junior

#2

O q tem aqui?

#3

Olá jakefrog,

Tem a seguinte linha…

 this.cupom = new Zan_M01();

Att.,

Junior

#4

Existe alguma coisa no construtor? “new Zan_M01();”

Em qual método do seu MB essa linha é executada?

#5

No construtor só existe as variáveis que utilizo para setar quando o usuário está preenchendo um formulário.

Esta linha está sendo executada no método que eu chamo a tela do xhtml (método telaEmitirGuia).

Att.,

Junior

#6

Blz, mas existe algo nesse construtor também? “new Zan_M01();” Algum código que talvez leve ao erro?

Eu sei que pode paracer tosco mas tente renomear a classe ZanM01 pois ela não está no padrão correto tendo o _.

#7

Pelo o que eu vi não teria nada no código do construtor que poderia levar ao erro (aparentemente não).

Vou renomear então a classe e acompanhar para ver se o erro irá persistir, pois o mais interessante é que não é sempre que acontece.

Obrigado pela ajuda jakefrog.

Att.,

Junior

#8

[quote=icjunior07]Pelo o que eu vi não teria nada no código do construtor que poderia levar ao erro (aparentemente não).

Vou renomear então a classe e acompanhar para ver se o erro irá persistir, pois o mais interessante é que não é sempre que acontece.

Obrigado pela ajuda jakefrog.

Att.,

Junior[/quote]

Bem não sei se ajudei muito. Realmente tá muito estranho esse erro.

Nessa linha que eu apontei, é uma linha que ele levanta no log que pode acontecer algum Nullpointer ou coisa parecida.

Seu MB tem um construtor default né? Apenas “meuMB()”?

#9

Olá jakefrog,

Então cara, acho que vi de onde parte o erro… pelo o que parece é quando o sistema fica muito tempo sem ser utilizado, aí ele perde a sessão e acaba gerando o erro…

Agora vou correr atrás para validar a sessão e voltar ao login…

Obrigado pela ajuda,

Att.,

Junior

#10