GeoscalingDNS + external config supplier - deadlock?

gistfile1.txt

"brooklyn-jetty-server-8443-qtp878715618-32" prio=10 tid=0x00007f7ecd87d000 nid=0x7371 waiting on condition [0x00007f7eba19a000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00000007be966a90> (a java.util.concurrent.FutureTask)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
        at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:425)
        at java.util.concurrent.FutureTask.get(FutureTask.java:187)
        at com.google.common.util.concurrent.ForwardingFuture.get(ForwardingFuture.java:63)
        at org.apache.brooklyn.util.core.task.BasicTask.get(BasicTask.java:361)
        at org.apache.brooklyn.util.time.Durations.get(Durations.java:43)
        at org.apache.brooklyn.util.time.Durations.get(Durations.java:64)
        at org.apache.brooklyn.util.core.task.ValueResolver.getMaybeInternal(ValueResolver.java:348)
        at org.apache.brooklyn.util.core.task.ValueResolver.getMaybe(ValueResolver.java:257)
        at org.apache.brooklyn.util.core.task.ValueResolver.get(ValueResolver.java:250)
        at org.apache.brooklyn.util.core.task.Tasks.resolveValue(Tasks.java:139)
        at org.apache.brooklyn.core.config.BasicConfigKey.resolveValue(BasicConfigKey.java:294)
        at org.apache.brooklyn.core.config.BasicConfigKey.extractValue(BasicConfigKey.java:279)
        at org.apache.brooklyn.core.entity.internal.EntityConfigMap.getConfig(EntityConfigMap.java:118)
        at org.apache.brooklyn.core.config.internal.AbstractConfigMapImpl.getConfig(AbstractConfigMapImpl.java:50)
        at org.apache.brooklyn.core.entity.AbstractEntity$BasicConfigurationSupport.get(AbstractEntity.java:1180)
        at org.apache.brooklyn.entity.dns.geoscaling.GeoscalingDnsServiceImpl.applyConfig(GeoscalingDnsServiceImpl.java:94)
        - locked <0x00000007be8929d8> (a org.apache.brooklyn.entity.dns.geoscaling.GeoscalingDnsServiceImpl)
        at org.apache.brooklyn.entity.dns.geoscaling.GeoscalingDnsServiceImpl.onManagementBecomingMaster(GeoscalingDnsServiceImpl.java:81)
        at org.apache.brooklyn.core.mgmt.internal.EntityManagementSupport.onManagementStarted(EntityManagementSupport.java:256)
        at org.apache.brooklyn.core.mgmt.internal.LocalEntityManager.manageRecursive(LocalEntityManager.java:389)
        at org.apache.brooklyn.core.mgmt.internal.LocalEntityManager.manage(LocalEntityManager.java:275)
        at org.apache.brooklyn.core.mgmt.internal.LocalEntityManager.createEntity(LocalEntityManager.java:149)
        at org.apache.brooklyn.core.mgmt.EntityManagementUtils.createUnstarted(EntityManagementUtils.java:80)
        at org.apache.brooklyn.rest.resources.ApplicationResource.launch(ApplicationResource.java:294)
        at org.apache.brooklyn.rest.resources.ApplicationResource.createFromYaml(ApplicationResource.java:286)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:180)
        at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)
        at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:200)
        at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:99)
        at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59)
        at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96)
        at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308)
        - locked <0x00000007be816020> (a org.apache.cxf.phase.PhaseInterceptorChain)
        at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
        at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:251)
        at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234)
        at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208)
        at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160)
        at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:180)
        at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:293)
        at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPost(AbstractHTTPServlet.java:212)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
        at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:268)
        at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
        at org.apache.brooklyn.rest.filter.LoggingFilter.doFilter(LoggingFilter.java:91)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at org.apache.brooklyn.rest.filter.RequestTaggingFilter.doFilter(RequestTaggingFilter.java:51)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:542)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at org.eclipse.jetty.server.Server.handle(Server.java:499)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
        at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
        at java.lang.Thread.run(Thread.java:745)