authenticationManager not available when trying to access database from singleton EJB @PreDestroy method

When a @PreDestroy singleton EJB method tries to access a secured datasource the following NPE is thrown:

15:38:25,159 WARN [org.jboss.as.ee] JBAS011005: Failed to destroy component instance org.jboss.as.ejb3.component.singleton.SingletonComponentInstance@17e123e: javax.ejb.EJBException: java.lang.NullPointerException
at org.jboss.as.ejb3.tx.BMTInterceptor.handleException(BMTInterceptor.java:78)
at org.jboss.as.ejb3.tx.EjbBMTInterceptor.checkStatelessDone(EjbBMTInterceptor.java:93)
at org.jboss.as.ejb3.tx.EjbBMTInterceptor.handleInvocation(EjbBMTInterceptor.java:108)
at org.jboss.as.ejb3.tx.BMTInterceptor.processInvocation(BMTInterceptor.java:56)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.as.ee.component.BasicComponentInstance.destroy(BasicComponentInstance.java:119) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.as.ejb3.component.singleton.SingletonComponent.destroySingletonInstance(SingletonComponent.java:179)
at org.jboss.as.ejb3.component.singleton.SingletonComponent.stop(SingletonComponent.java:136)
at org.jboss.as.ee.component.ComponentStartService.stop(ComponentStartService.java:49) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:1911) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
at org.jboss.msc.service.ServiceControllerImpl$StopTask.run(ServiceControllerImpl.java:1874) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_01]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_01]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_01]
Caused by: java.lang.NullPointerException
at org.jboss.security.plugins.JBossSecuritySubjectFactory.createSubject(JBossSecuritySubjectFactory.java:88)
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getSubject(AbstractConnectionManager.java:689)
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:463)
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:129)
at org.test.UpdateStatus.updateStatus(UpdateStatus.java:53)
at org.test.UpdateStatus.stop(UpdateStatus.java:42)
at org.test.StartupSessionBean.stop(StartupSessionBean.java:78)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_01]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_01]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_01]
at java.lang.reflect.Method.invoke(Method.java:601) [rt.jar:1.7.0_01]
at org.jboss.as.ee.component.ManagedReferenceLifecycleMethodInterceptorFactory$ManagedReferenceLifecycleMethodInterceptor.processInvocation(ManagedReferenceLifecycleMethodInterceptorFactory.java:130) [jboss-as-ee-7.1.1
.Final.jar:7.1.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.as.ee.component.ManagedReferenceReleaseInterceptorFactory$ManagedReferenceReleaseInterceptor.processInvocation(ManagedReferenceReleaseInterceptorFactory.java:90) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.as.ee.component.ManagedReferenceReleaseInterceptorFactory$ManagedReferenceReleaseInterceptor.processInvocation(ManagedReferenceReleaseInterceptorFactory.java:90) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]
at org.jboss.as.ejb3.tx.EjbBMTInterceptor.handleInvocation(EjbBMTInterceptor.java:105)
... 16 more