Please see issue 18240 http://java.net/jira/browse/GLASSFISH-18240 for setup details and for initial description of this issue.
The loadbalancer reconfiguration is observed to have stopped after the point that the 2 DAS related issues were observed. Each test depends on (and triggers) reconfiguration of the loadbalancer (running on the Webserver). LB reconfiguration is triggered after deploying the application that is used by the test.
Its not clear if this reconfiguration problem is caused by the DAS related issues and so this separate bug has been filed to track the reconfiguration problem.
Issue 18240 has the relevant logs attached to it. It also has notes on the specific logs.