RAR inside EAR: deployment issues

I'm having troubles with deploying inbound RARs inside EARs. For example, the test ear attached to AS7-5471 is sometimes deployed successfully and sometimes not, it seems that the probability does not depend on the fact whether it is the first deployment or redeployment. The exception is:

[org.jboss.msc.service.fail] (MSC service thread 1-4) MSC00001: Failed to start service jboss.deployment.subunit."test-ear.ear"."test-rar-2.0.0-SNAPSHOT.rar".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.subunit."test-ear.ear"."test-rar-2.0.0-SNAPSHOT.rar".INSTALL: JBAS018733: Failed to process phase INSTALL of subdeployment "test-rar-2.0.0-SNAPSHOT.rar" of deployment "test-ear.ear"
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:123) [jboss-as-server-7.1.4.Final-SNAPSHOT.jar:7.1.4.Final-SNAPSHOT]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [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_09]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_09]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_09]
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: java.lang.NullPointerException
at org.jboss.as.connector.deployers.ra.processors.ParsedRaDeploymentProcessor.deploy(ParsedRaDeploymentProcessor.java:182)
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:116) [jboss-as-server-7.1.4.Final-SNAPSHOT.jar:7.1.4.Final-SNAPSHOT]
... 5 more
Caused by: java.lang.NullPointerException
at org.jboss.jca.common.metadata.ra.common.ResourceAdapter1516Impl.validate(ResourceAdapter1516Impl.java:351)
at org.jboss.jca.common.metadata.ra.common.ConnectorAbstractmpl.validate(ConnectorAbstractmpl.java:332)
at org.jboss.as.connector.deployers.ra.processors.ParsedRaDeploymentProcessor.deploy(ParsedRaDeploymentProcessor.java:139)
... 6 more

A bigger project with MDB and @ResourceAdapter annotation sometimes fails (and sometimes not) with the following exception:

[org.jboss.msc.service.fail] (MSC service thread 1-4) MSC00001: Failed to start service jboss.deployment.subunit."adapter-snmp-ear.ear"."adapter-snmp-ejb.jar".component.InboundMDB.CREATE: org.jboss.msc.service.StartException in service jboss.deployment.subunit."adapter-snmp-ear.ear"."adapter-snmp-ejb.jar".component.InboundMDB.CREATE: Failed to start service
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1767) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_09]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_09]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_09]
Caused by: java.lang.IllegalStateException: JBAS014331: No resource adapter registered with resource adapter name adapter-snmp-ear.ear#adapter-snmp-rar
at org.jboss.as.ejb3.component.EJBUtilities.createActivationSpecs(EJBUtilities.java:83)
at org.jboss.as.ejb3.component.messagedriven.MessageDrivenComponentCreateService.createComponent(MessageDrivenComponentCreateService.java:89)
at org.jboss.as.ee.component.BasicComponentCreateService.start(BasicComponentCreateService.java:91)
at org.jboss.as.ejb3.component.messagedriven.MessageDrivenComponentCreateService.start(MessageDrivenComponentCreateService.java:76)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
... 3 more