在下一次调用中在使用@Singleton注释的bean中获取NullPointerException之后，运行wildfly 8.1.Final，我收到带有以下日志的javax.ejb.NoSuchEJBException：
javax.ejb.NoSuchEJBException: JBAS014300: Could not find EJB with id {[-127, 119, 43, -88, -83, -123, 67, 109, -77, 112, 107, -30, -42, -101, 114, -111]}
at org.jboss.as.ejb3.component.stateful.StatefulComponentInstanceInterceptor.processInvocation(StatefulComponentInstanceInterceptor.java:62) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInCallerTx(CMTTxInterceptor.java:251) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:342) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:43) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:95) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:59) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:55) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.ContextClassLoaderInterceptor.processInvocation(ContextClassLoaderInterceptor.java:64)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:326)
at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:439)
at org.jboss.invocation.AccessCheckingInterceptor.processInvocation(AccessCheckingInterceptor.java:61)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:326)
at org.jboss.invocation.PrivilegedWithCombinerInterceptor.processInvocation(PrivilegedWithCombinerInterceptor.java:80)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:185)
at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:182)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:73)
at com.bazaarbt.strategy.mm.multilevelstrategy.MultiLevelStrategySingletonEJB$$$view69.updateOnOrderBook(Unknown Source) [classes:]
at com.bazaarbt.strategy.StrategyRunner.runStrategy(StrategyRunner.java:65) [classes:]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_05]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_05]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_05]
at java.lang.reflect.Method.invoke(Method.java:483) [rt.jar:1.8.0_05]
at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
我读到可能的原因之一可能是使用@Remove批注，但我没有使用它。有谁知道为什么会这样吗？
已编辑
@Slf4j
@MessageDriven(name = "MessageReceiver", activationConfig = {
@ActivationConfigProperty(propertyName = "destinationLookup", propertyValue = "jms/tswReply"),
@ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Topic"),
@ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge") })
public class MyMDB implements MessageListener {
@EJB
private LogicBean lba;
@Override
public void onMessage(Message message) {
lba.update(message);
}
...
}
@Slf4j
@Stateless
@Named
public class LogicBeanA {
@EJB
private LogicBeanB lbb;
public void update(Message message) {
...
lbb.run();
..
}
}
@Slf4j
@Setter
@Stateful
@Startup
public class LogicBeanB {
@Inject
private LogicBeanC lbc;
public void run(){
lbc.doSomething();
}
}
@Slf4j
@Getter
@Setter
@Dependent
public class LogicBeanC {
public void doSomething(){
internalLogic(); // from here I got NPE
}
}
问题是只有在第一次执行onMessage时才会引发NPE。在随后的调用中，我收到了NoSuchEJBException，如果有人能解释为什么会发生以及如何禁用此行为，我将不胜感激。提前致谢。 （我可以处理的NPE，但是让我最担心的是，当发生任何异常时，它将杀死Bean，并且因此整个应用程序崩溃）。
最佳答案
好。我的错。最初，我计划使用@Singleton而不是@Stateful。对于@Stateful规范，声明如果“实例从任何方法引发系统异常”，则实例将被销毁。