the purge attribute <store class="..." purge="false"> <property name="..">...</property> ... </store> is set to true by default in JDG server. I'm not sure whether this deliberate or a bug. IMO this is quite dangerous default - causing the entries not to survive server restarts.
purge="true" is the default for all cache stores, so I don't see why custom ones should be treated differently. Whether purging should be true as a default is certainly questionable
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