<p>Specifies whether JMS clients will get an exception when
sending persistent messages to a destination targeted to a JMS server
that does not have a persistent store configured.
This parameter only has effect when the Store Enabled parameter
is disabled (false).</p>
<p>When set to false, the default, clients will get an exception when sending
persistent messages to a JMS server with no store configured.
When set to true, then persistent messages are downgraded to non-persistent;
however, the send operations are allowed to continue.</p>
(Interface=weblogic.management.configuration.JMSServerMBean Attribute=isAllowsPersistentDowngrade)