EAP 6 "org.infinispan.CacheException: Error joining the cluster"

Issue

We started finding this eror in server.log and the applications deployed were not available.
After that we restarted the server without any problem, but we want to know the reason for this error :

ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 66) MSC000001: Failed to start service jboss.infinispa
n.web.repl: org.jboss.msc.service.StartException in service jboss.infinispan.web.repl: org.infinispan.CacheException: Unable to invo
ke method public void org.infinispan.statetransfer.BaseStateTransferManagerImpl.waitForJoinToComplete() throws java.lang.Interrupted
Exception on object of type ReplicatedStateTransferManagerImpl
        at org.jboss.as.clustering.msc.AsynchronousService$1.run(AsynchronousService.java:87)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [rt.jar:1.6.0_37]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [rt.jar:1.6.0_37]
        at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_37]
        at org.jboss.threads.JBossThread.run(JBossThread.java:122)
Caused by: org.infinispan.CacheException: Unable to invoke method public void org.infinispan.statetransfer.BaseStateTransferManagerI
mpl.waitForJoinToComplete() throws java.lang.InterruptedException on object of type ReplicatedStateTransferManagerImpl
        at org.infinispan.util.ReflectionUtil.invokeAccessibly(ReflectionUtil.java:238)
        at org.infinispan.factories.AbstractComponentRegistry$PrioritizedMethod.invoke(AbstractComponentRegistry.java:894)
        at org.infinispan.factories.AbstractComponentRegistry.invokeStartMethods(AbstractComponentRegistry.java:644)
        at org.infinispan.factories.AbstractComponentRegistry.internalStart(AbstractComponentRegistry.java:633)
        at org.infinispan.factories.AbstractComponentRegistry.start(AbstractComponentRegistry.java:536)
        at org.infinispan.factories.ComponentRegistry.start(ComponentRegistry.java:175)
        .. .. ..
        at org.jboss.as.clustering.infinispan.DefaultEmbeddedCacheManager.getCache(DefaultEmbeddedCacheManager.java:116)
        at org.jboss.as.clustering.infinispan.subsystem.CacheService.start(CacheService.java:78)
        at org.jboss.as.clustering.msc.AsynchronousService$1.run(AsynchronousService.java:82)
        ... 4 more
Caused by: org.infinispan.CacheException: Error joining the cluster
        at org.infinispan.statetransfer.BaseStateTransferManagerImpl.waitForJoinToComplete(BaseStateTransferManagerImpl.java:157)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.6.0_37]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [rt.jar:1.6.0_37]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [rt.jar:1.6.0_37]
        at java.lang.reflect.Method.invoke(Method.java:597) [rt.jar:1.6.0_37]
        at org.infinispan.util.ReflectionUtil.invokeAccessibly(ReflectionUtil.java:236)
        ... 17 more