@Startup @Singleton @PostConstruct giving a RunTimeException (Could not invoke PostConstruct on the newly created bean instance)
I'm trying to build a bean which is launched at startup, to do migration on data we have. It is annotated as a @Singleton @Startup bean, but the @PostConstruct is failing, but I have no idea why.
This is the code:
@Startup
@Singleton
@DependsOn("SearchInitializer")
public class SearchMigrator {
@Inject
@Any
private Instance<MigrationScenario> migrationScenarios;
@Inject
private SearchRepository repository;
private List<MigrationScenario> sortedScenarioList;
@PostConstruct
public void doMigration() {
(call run() on each MigrationScenario)
}
}
The SearchInitializer is also a @Startup @Singleton bean, with a @PostConstruct annotation on a method, and that runs fine (also, before this bean, so the @DependsOn is working correctly). SearchRepository is a @Stateless bean, which is going to the db.
However, if I run this code, I get this exception:
Create: java.lang.RuntimeException: Could not invoke PostConstruct on the newly created bean instance
Anybody any idea what I'm doing wrong?
EDIT
Additional information: I suspect that the "@Inject private SearchRepository repository" is the culprit. When I remove the injection of that repository, it boots just fine. If I don't, I get this error:
16:10:39,531 ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] Error installing to Start: name=startup-singleton-initiator:topLevelUnit=xxx-war.war,unit=xxx-war.war,bean=SearchInitializer aliases=[startup-singleton-initiator:bean=SearchInitializer,topLevelUnit=xxx-war.war,unit=xxx-war.war] state=Create: java.lang.RuntimeException: Could not invoke PostConstruct on the newly created bean instance
at org.jboss.ejb3.singleton.impl.container.SingletonEJBInstanceManagerImpl.create(SingletonEJBInstanceManagerImpl.java:137) [:1.0.2]
at org.jboss.ejb3.singleton.impl.container.SingletonEJBInstanceManagerImpl.get(SingletonEJBInstanceManagerImpl.java:152) [:1.0.2]
at org.jboss.ejb3.singleton.deployer.StartupSingletonInitiator.start(StartupSingletonInitiator.java:84) [:1.0.2]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_30]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [:1.6.0_30]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_30]
at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_30]
at org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(ReflectionUtils.java:60) [jboss-reflect.jar:2.2.1.SP1]
at org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(ReflectMethodInfoImpl.java:168) [jboss-reflect.jar:2.2.1.SP1]
at org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethodJoinPoint.java:66) [jboss-reflect.jar:2.2.1.SP1]
at org.jboss.kernel.plugins.dependency.KernelControllerContextAction$JoinpointDispatchWrapper.execute(KernelControllerContextAction.java:257) [jboss-kernel.jar:2.2.0.SP2]
at org.jboss.kernel.plugins.dependency.ExecutionWrapper.execute(ExecutionWrapper.java:47) [jboss-kernel.jar:2.2.0.SP2]
at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchExecutionWrapper(KernelControllerContextAction.java:125) [jboss-kernel.jar:2.2.0.SP2]
at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchJoinPoint(KernelControllerContextAction.java:72) [jboss-kernel.jar:2.2.0.SP2]
at org.jboss.kernel.plugins.dependency.LifecycleAction.installActionInternal(LifecycleAction.java:202) [jboss-kernel.jar:2.2.0.SP2]
at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:54) [jboss-kernel.jar:2.2.0.SP2]
at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:42) [jboss-kernel.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:379) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2044) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1083) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1322) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1246) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1139) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:939) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:654) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.deployers.plugins.deployers.DeployersImpl.change(DeployersImpl.java:1983) [:2.2.2.GA]
at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:1076) [:2.2.2.GA]
at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:679) [:2.2.2.GA]
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:380) [:6.1.0.Final]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_30]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [:1.6.0_30]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_30]
at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_30]
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157) [:6.0.0.GA]
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96) [:6.0.0.GA]
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) [:6.0.0.GA]
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:271) [:6.0.0.GA]
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:670) [:6.0.0.GA]
at org.jboss.system.server.jmx.MBeanServerWrapper.invoke(MBeanServerWrapper.java:138) [:6.1.0.Final]
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1427) [:1.6.0_30]
at javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72) [:1.6.0_30]
at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1265) [:1.6.0_30]
at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1360) [:1.6.0_30]
at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:788) [:1.6.0_30]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_30]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [:1.6.0_30]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_30]
at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_30]
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:303) [:1.6.0_30]
at sun.rmi.transport.Transport$1.run(Transport.java:159) [:1.6.0_30]
at java.security.AccessController.doPrivileged(Native Method) [:1.6.0_30]
at sun.rmi.transport.Transport.serviceCall(Transport.java:155) [:1.6.0_30]
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535) [:1.6.0_30]
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790) [:1.6.0_30]
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649) [:1.6.0_30]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_30]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_30]
at java.lang.Thread.run(Thread.java:662) [:1.6.0_30]
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
at org.jboss.ejb3.singleton.aop.impl.AOPBasedSingletonContainer.invokeCallback(AOPBasedSingletonContainer.java:1065) [:1.0.2]
at org.jboss.ejb3.EJBContainer.invokePostConstruct(EJBContainer.java:1396) [:1.7.21]
at org.jboss.ejb3.singleton.aop.impl.AOPBasedSingletonContainer.postConstruct(AOPBasedSingletonContainer.java:762) [:1.0.2]
at org.jboss.ejb3.singleton.impl.container.SingletonEJBInstanceManagerImpl.create(SingletonEJBInstanceManagerImpl.java:133) [:1.0.2]
... 60 more
Caused by: java.lang.NullPointerException
at org.jboss.ejb3.EJBContainer.getApplicationException(EJBContainer.java:509) [:1.7.21]
at org.jboss.ejb3.singleton.aop.impl.ConstructionInvocationContextAdapter.getApplicationException(ConstructionInvocationContextAdapter.java:62) [:1.0.2]
at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.handleExceptionInOurTx(CMTTxInterceptor.java:163) [:0.0.2]
at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:251) [:0.0.2]
at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.requiresNew(CMTTxInterceptor.java:392) [:0.0.2]
at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invoke(CMTTxInterceptor.java:211) [:0.0.2]
at org.jboss.ejb3.tx2.aop.CMTTxInterceptorWrapper.invoke(CMTTxInterceptorWrapper.java:52) [:0.0.2]
at org.jboss.aop.joinpoint.ConstructionInvocation.invokeNext(ConstructionInvocation.java:80) [jboss-aop.jar:2.2.2.GA]
at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76) [:1.0.0.GA]
at org.jboss.aop.joinpoint.ConstructionInvocation.invokeNext(ConstructionInvocation.java:80) [jboss-aop.jar:2.2.2.GA]
at org.jboss.ejb3.core.context.CurrentInvocationContextInterceptor.invoke(CurrentInvocationContextInterceptor.java:47) [:1.7.21]
at org.jboss.aop.joinpoint.ConstructionInvocation.invokeNext(ConstructionInvocation.java:80) [jboss-aop.jar:2.2.2.GA]
at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:90) [:1.1.3]
at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_1631131631.invoke(InvocationContextInterceptor_z_setup_1631131631.java) [:]
at org.jboss.aop.joinpoint.ConstructionInvocation.invokeNext(ConstructionInvocation.java:80) [jboss-aop.jar:2.2.2.GA]
at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67) [:1.0.1]
at org.jboss.aop.joinpoint.ConstructionInvocation.invokeNext(ConstructionInvocation.java:80) [jboss-aop.jar:2.2.2.GA]
at org.jboss.ejb3.singleton.aop.impl.AOPBasedSingletonContainer.invokeCallback(AOPBasedSingletonContainer.java:1061) [:1.0.2]
... 63 more
If I debug through the boot process, I see that the repository is actually proxied (which is also supported via the references to AOP in the stacktrace).
But still no luck in figuring it out! Anyone?
Answer
OK, I figured out what the problem was. Actually, my answer will cover the general way of handling this kind of error. The problem for this error is JBoss itself: the application server actually eats the real error, and just throws a NullPointerException in your face.
What I did to get my actual error was temporarily enter this hack in my code, just to find out what was going on:
@PostConstruct
public void doMigration() throws Throwable {
try {
runAllFoundScenarios();
} catch (Throwable e) {
System.out.println("Cause: " + e.getCause());
System.out.println("Message: " + e.getMessage());
System.out.println("Class: " + e.getClass());
System.out.println("StackTrace: " + e.getStackTrace());
throw e;
}
}
That way, I was able to determine the real cause by looking in the log, which allowed me to actually tackle this problem. I could find people everywhere on the web with the same problem, but nobody ever posted a workaround, so I hope this answer will help you find out what is really going on.
FYI, for me, it was a JPA problem with the injected repository.