Problem during SM shutdown

Saw this one time when shutting down an SM in one window and it's remote DC in another.

[Server Manager] 15:28:46,162 ERROR [org.jboss.as.protocol] (pool-1-thread-26) Failed to close resource null: java.lang.NullPointerException
[Server Manager] at org.jboss.as.protocol.StreamUtils.safeClose(StreamUtils.java:288)
[Server Manager] at org.jboss.as.protocol.mgmt.ManagementRequest.execute(ManagementRequest.java:87)
[Server Manager] at org.jboss.as.protocol.mgmt.ManagementRequest.executeForResult(ManagementRequest.java:101)
[Server Manager] at org.jboss.as.domain.controller.mgmt.RemoteDomainControllerClient.isActive(RemoteDomainControllerClient.java:121)
[Server Manager] at org.jboss.as.domain.controller.DomainController$1.run(DomainController.java:129)
[Server Manager] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) [:1.6.0_22]
[Server Manager] at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317) [:1.6.0_22]
[Server Manager] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_22]
[Server Manager] at java.lang.Thread.run(Thread.java:680) [:1.6.0_22]
[Server Manager] at org.jboss.threads.JBossThread.run(JBossThread.java:122)
[Server Manager]
[Server Manager] 15:28:46,174 ERROR [org.jboss.as.protocol] (pool-1-thread-26) Failed to close resource null: java.lang.NullPointerException
[Server Manager] at org.jboss.as.protocol.StreamUtils.safeClose(StreamUtils.java:288)
[Server Manager] at org.jboss.as.protocol.mgmt.ManagementRequest.execute(ManagementRequest.java:88)
[Server Manager] at org.jboss.as.protocol.mgmt.ManagementRequest.executeForResult(ManagementRequest.java:101)
[Server Manager] at org.jboss.as.domain.controller.mgmt.RemoteDomainControllerClient.isActive(RemoteDomainControllerClient.java:121)
[Server Manager] at org.jboss.as.domain.controller.DomainController$1.run(DomainController.java:129)
[Server Manager] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) [:1.6.0_22]
[Server Manager] at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317) [:1.6.0_22]
[Server Manager] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_22]
[Server Manager] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_22]
[Server Manager] at java.lang.Thread.run(Thread.java:680) [:1.6.0_22]
[Server Manager] at org.jboss.threads.JBossThread.run(JBossThread.java:122)