When you upgrade a cluster domain from Application Server 9.1/GlassFish v2 to Application Server 9.1 Update 1, you could encounter problems because the security setting is incorrect for the admin-service whose type attribute is das-and server in the target domain.xml. The solution is to edit the domain.xml file in the corresponding upgraded domain and correct the setting of the security-enabled attribute. Look for the following statements in the domain.xml file.
<admin-service system-jmx-connector-name="system" type="das-and-server"> <|-- The JSR 160 "system-jmx-connector"--> <jmx-connector accept-all="false" address="0.0.0.0" auth-realm-name="admin-realm" enabled=true" name="system" port="8686" protocol="rmi_jrmp" security-enabled="true">