After shutdown of server, the following error was logged at the end of the server log: 

06:49:52,508 INFO  [org.apache.coyote.http11] (MSC service thread 1-2) JBWEB003075: Coyote HTTP/1.1 pausing on: http-/10.16.89.217:8080
06:49:52,541 INFO  [org.apache.coyote.http11] (MSC service thread 1-2) JBWEB003077: Coyote HTTP/1.1 stopping on : http-/10.16.89.217:8080
06:49:52,530 INFO  [org.apache.catalina.core] (MSC service thread 1-1) JBWEB001079: Container org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/] has not been started
06:49:52,545 INFO  [org.jboss.as.connector.deployment] (MSC service thread 1-2) JBAS010410: Unbound JCA ConnectionFactory [java:/JmsXA]
06:49:52,545 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-2) JBAS010409: Unbound data source [java:jboss/datasources/ExampleDS]
06:49:52,548 INFO  [org.jboss.jaxr] (MSC service thread 1-2) JBAS014002: UnBinding JAXR ConnectionFactory: java:jboss/jaxr/ConnectionFactory
06:49:52,517 INFO  [org.jboss.modcluster] (ServerService Thread Pool -- 65) MODCLUSTER000002: Initiating mod_cluster shutdown
06:49:52,617 INFO  [org.apache.coyote.ajp] (MSC service thread 1-2) JBWEB003048: Pausing Coyote AJP/1.3 on ajp-/10.16.89.217:8009
06:49:52,618 INFO  [org.apache.coyote.ajp] (MSC service thread 1-2) JBWEB003051: Stopping Coyote AJP/1.3 on ajp-/10.16.89.217:8009
06:49:52,612 INFO  [org.jboss.as.messaging] (ServerService Thread Pool -- 64) JBAS011605: Unbound messaging object to jndi name java:jboss/exported/jms/RemoteConnectionFactory
06:49:52,606 INFO  [org.hornetq.ra] (ServerService Thread Pool -- 68) HQ151003: HornetQ resource adaptor stopped
06:49:52,818 INFO  [org.hornetq.core.server] (ServerService Thread Pool -- 66) HQ221002: HornetQ Server version 2.3.13.Final (2.3.123, 123) [afa3f2f5-a136-11e3-b543-6b595b2e0832] stopped
06:49:52,842 INFO  [org.jboss.as] (MSC service thread 1-2) JBAS015950: JBoss EAP 6.2.2.GA (AS 7.3.2.Final-redhat-1) stopped in 687ms
06:49:52,846 ERROR [stderr] (main) java.util.concurrent.ExecutionException: Operation failed

06:49:52,847 ERROR [stderr] (main) 	at org.jboss.threads.AsyncFutureTask.operationFailed(AsyncFutureTask.java:74)

06:49:52,847 ERROR [stderr] (main) 	at org.jboss.threads.AsyncFutureTask.get(AsyncFutureTask.java:268)

06:49:52,847 ERROR [stderr] (main) 	at org.jboss.as.server.Main.main(Main.java:95)

06:49:52,847 ERROR [stderr] (main) 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

06:49:52,847 ERROR [stderr] (main) 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

06:49:52,847 ERROR [stderr] (main) 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

06:49:52,848 ERROR [stderr] (main) 	at java.lang.reflect.Method.invoke(Method.java:597)

06:49:52,848 ERROR [stderr] (main) 	at org.jboss.modules.Module.run(Module.java:292)

06:49:52,848 ERROR [stderr] (main) 	at org.jboss.modules.Main.main(Main.java:455)

06:49:52,848 ERROR [stderr] (main) Caused by: java.lang.IllegalStateException: JBAS018720: Root service was removed

06:49:52,849 ERROR [stderr] (main) 	at org.jboss.as.server.BootstrapImpl$1.transition(BootstrapImpl.java:118)

06:49:52,849 ERROR [stderr] (main) 	at org.jboss.msc.service.ServiceControllerImpl.invokeListener(ServiceControllerImpl.java:1416)

06:49:52,849 ERROR [stderr] (main) 	at org.jboss.msc.service.ServiceControllerImpl.access$2700(ServiceControllerImpl.java:49)

06:49:52,849 ERROR [stderr] (main) 	at org.jboss.msc.service.ServiceControllerImpl$ListenerTask.run(ServiceControllerImpl.java:1954)

06:49:52,849 ERROR [stderr] (main) 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)

06:49:52,849 ERROR [stderr] (main) 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)

06:49:52,850 ERROR [stderr] (main) 	at java.lang.Thread.run(Thread.java:662)



This was seen only once, on windows machine (Win 2008, x86, Oracle JDK6), not sure about possible connection to environment.