31m06:37:32,154 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-3) MSC000001: Failed to start service jboss.deployment.subunit."simple-aggregate.ear"."deferred-bundle-b.jar".REGISTER: org.jboss.msc.service.StartException in service jboss.deployment.subunit."simple-aggregate.ear"."deferred-bundle-b.jar".REGISTER: JBAS018733: Failed to process phase REGISTER of subdeployment "deferred-bundle-b.jar" of deployment "simple-aggregate.ear"
	at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:166) [wildfly-server-8.0.0.Alpha2-SNAPSHOT.jar:8.0.0.Alpha2-SNAPSHOT]
	at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1942) [jboss-msc-1.2.0.Beta1.jar:1.2.0.Beta1]
	at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1875) [jboss-msc-1.2.0.Beta1.jar:1.2.0.Beta1]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_13]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_13]
	at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_13]
Caused by: java.util.ConcurrentModificationException
	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:394) [rt.jar:1.7.0_13]
	at java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:405) [rt.jar:1.7.0_13]
	at org.jboss.osgi.resolver.spi.AbstractEnvironment$1.next(AbstractEnvironment.java:204)
	at org.jboss.osgi.resolver.spi.AbstractEnvironment$1.next(AbstractEnvironment.java:192)
	at org.jboss.osgi.framework.internal.BundleManagerPlugin.getBundles(BundleManagerPlugin.java:385)
	at org.jboss.osgi.framework.internal.BundleManagerPlugin.getBundleByLocation(BundleManagerPlugin.java:427)
	at org.jboss.osgi.framework.internal.BundleManagerPlugin.createBundleRevision(BundleManagerPlugin.java:476)
	at org.jboss.as.osgi.deployment.BundleInstallProcessor.deploy(BundleInstallProcessor.java:82)
	at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:159) [wildfly-server-8.0.0.Alpha2-SNAPSHOT.jar:8.0.0.Alpha2-SNAPSHOT]