I am getting this on a recent master:

"11:28:55,999 ERROR [org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService$AS7DataSourceDeployer] (MSC service thread 1-2) Exception during createSubject()PB00024: Access Denied:Unauthenticated caller:null: java.lang.SecurityException: PB00024: Access Denied:Unauthenticated caller:null
"

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Heiko Braun
Senior Software Engineer
JBoss by Red Hat
http://about.me/hbraun