QuickStart:
clustering-ha-singleton

An attempt to run this quickstart against AS 7.2.0, results in the inability to compile. This appears due to some transitive dependency changes between 7.1.1.Final and the 7.2.0.Alpha1; namely, with org.slf4j.

The service classes:
cluster-ha-singleton/service/src/main/java/org/jboss/as/quickstarts/cluster/hasingleton/service/ejb/HATimerService.java
cluster-ha-singleton/service/src/main/java/org/jboss/as/quickstarts/cluster/hasingleton/service/ejb/SchedulerBean.java
cluster-ha-singleton/service/src/main/java/org/jboss/as/quickstarts/cluster/hasingleton/service/ejb/ServiceAccess.java
cluster-ha-singleton/service/src/main/java/org/jboss/as/quickstarts/cluster/hasingleton/service/ejb/ServiceAccessBean.java

have specific imports:
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

which should probably be eliminated (if possible) to use org.jboss.logging.Logger.

After resolving the dependency issue to get the QS to compile, the deployment failed due to missing dependencies:

10:12:11,301 INFO  [org.jboss.as.quickstarts.cluster.hasingleton.service.ejb.HATimerServiceActivator] (MSC service thread 1-1) HATimerService will be installed!
10:12:11,781 ERROR [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015870: Deploy of deployment "jboss-as-cluster-ha-singleton-service.jar" was rolled back with the following failure message: {"JBAS014771: Services with missing/unavailable dependencies" => ["jboss.quickstart.ha.singleton.timer is missing [jboss.cluster.singleton.registry, jboss.cluster.singleton]"]}