Thank you for your response. I already do read all messages to check whether a given message exists. However, I am trying to ascertain whether or not the queued message was successfully processed. Is there a way to achieve this?

What do you mean by queued message was successfully processed? Are you trying to validate whether the said message was consumed correctly or not?

If you're trying to check message status post consumption you can read message metadata from redis and check it's status. It's status would be changed.

Yes, that is what I meant - "whether the said message was consumed correctly". In my tests, I noticed that if the message is successfully consumed, it gets removed from the queue. So I presume the only time the message is present in the queue, is when it was not consumed (due to errors in the listener/receiver of the message)?

Also, could you point me to the right API method to use in order to obtain the metadata? I see that the com.github.sonus21.rqueue.core.Job class has MessageMetadata. But I was not able to get a handle to the Job class via the RqueueMessage's MessageHeaders property. Because MessageHeaders always appears to be null.