I send a message to queue "in" and then kill -9 the broker. After the restart, sometimes the message is lost and I can see following in broker log:
Duplicate message add attempt rejected. Destination: QUEUE://in, Message id: ID:abe-ThinkPad-T430s-55936-1434452370587-1:1:1:1:1
<policyEntry ... persistJMSRedelivery=true/>
I'm unable to reproduce this issue.