Singleton deployments does not work in domain mode -------------------------------------------------- Key: WFLY-8706 URL: https://issues.jboss.org/browse/WFLY-8706 Project: WildFly Issue Type: Bug Components: Clustering Affects Versions: 10.1.0.Final Environment: Centos Wildfly 10.1.0.Final (two instances and one domain controller) Java 8 Reporter: Ariel Carrera Assignee: Paul Ferraro In a domain mode, when a deployment is a "singleton deployment" (with a singleton- deployment.xml descriptor), it is working fine if the server nodes are started sequently but fails if it is started from domain console. When a deployments needs to be updated, a race condition happens and two instances of the deployment are started. From logs: node1: 12:39:48,434 INFO [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 133) WFLYCLINF0002: Started default cache from server container 12:39:48,436 INFO [org.wildfly.clustering.server] (notification-thread--p84-t1) WFLYCLSV0003: node1:one *elected as the singleton provider of the jboss.deployment.unit."my-deployment.jar"*.FIRST_MODULE_USE service 12:39:48,440 INFO [org.wildfly.clustering.server] (notification-thread--p84-t1) WFLYCLSV0001: This node will now operate as the singleton provider of the jboss.deployment.unit."my-deployment.jar".FIRST_MODULE_USE service node2: 12:39:48,370 INFO [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 122) WFLYCLINF0002: Started default cache from server container 12:39:48,372 INFO [org.wildfly.clustering.server] (notification-thread--p193-t1) WFLYCLSV0003: node2:two *elected as the singleton provider of the jboss.deployment.unit."my-deployment.jar"*.FIRST_MODULE_USE service 12:39:48,372 INFO [org.wildfly.clustering.server] (notification-thread--p193-t1) WFLYCLSV0001: This node will now operate as the singleton provider of the jboss.deployment.unit."my-deployment.jar".FIRST_MODULE_USE service