AMQ 6.3 - Not able to execute jmx retryMessages on DLQ

Issue

• We are using AMQ 6.3 R15.

• DLQ are configure as individual DLQ.

  <deadLetterStrategy>
                      <individualDeadLetterStrategy
                          queuePrefix="" queueSuffix=".error" useQueueForQueueMessages="true" />
  </deadLetterStrategy>
  

• When messages are places by a consumer in the DLQ, it's possible to execute retryMessages() from the hawtio console. then the message are consumed again.

• If the broker is restarted while message are still in the DLQ, after the broker is up & running, it's not possible to execute "retryMessages()" the message appears : "java.lang.Exception : Retry of message is only possible on Dead Letter Queues!"
• So, it seems, after a reboot of the broker, that the retryMessages() is not possible to invoke. I don't know if it's a bug or a feature, maybe you can have a look.