UnsupportedOperationException on SingletonService.getValue() ------------------------------------------------------------ Key: WFLY-5612 URL: https://issues.jboss.org/browse/WFLY-5612 Project: WildFly Issue Type: Bug Components: Clustering Affects Versions: 9.0.2.Final Reporter: Thomas Diesler Assignee: Paul Ferraro {code} java.lang.IllegalStateException: java.lang.UnsupportedOperationException at java.util.Collections$1.remove(Collections.java:4684) at org.wildfly.clustering.server.singleton.SingletonService$SingletonDispatcher.getValueRef(SingletonService.java:266) at org.wildfly.clustering.server.singleton.SingletonService.getValue(SingletonService.java:225) at org.wildfly.clustering.server.singleton.SingletonService.getValue(SingletonService.java:69) at org.wildfly.clustering.service.AsynchronousServiceBuilder.getValue(AsynchronousServiceBuilder.java:92) at org.jboss.msc.service.ServiceControllerImpl.awaitValue(ServiceControllerImpl.java:1166) at org.wildfly.camel.test.singleton.SingletonRouteTest.testSingletonService(SingletonRouteTest.java:138) {code} This is happening when I try to provide a code example for a singleton service like [this|https://github.com/wildfly-extras/wildfly-camel/blob/master/itests/s...] CrossRef: https://github.com/wildfly-extras/wildfly-camel/issues/77