Hi
I have been testing out message grouping in hornetq, and wants to know if its possible to reset messagegroups on hornetq. I found a note on jboss messaging saying :
The router will always try to route messages with the same JMSXGroupID to the same receiver.
+ * If the JMSXGroupID is not set, the receivers will be chosen by round robin.
+ * To reset the receiver associated to a given JMSXGroupID, the producer can send a message
+ * with the JMSXGroupSeq header to 0
Is it possible to something like this on hornetQ?
My scenario I tested was this. Simulating taking down for ex. an App. Server
Start hornetq
Start 3 consumers.
Send 10 msg with 3 different messagegroups.
So far its all good.
Now close down 1 consumer.
Resend 10 msg with 3 different messagegroups.
The 2 consumers left consumes all messages.
Start up consumer 3 again
Resend 10 msg with 3 different messagegroups.
Now the 2 consumers are still consuming all messages, the new consumer dont get any messages.
The only way I could get the load to spread evenly again was to recycle HornetQ.
Another thing I stumbled on was that if I killed a consumer with kill -9 <pid>, none of the consumers left would get any messages until I started up that consumer again. This was tested on 2.1.0 Final, I will retest that on 2.2.5 later on and file a question on that when I tested it. Just mentioned it incase anyone reads and knows if it is a knowned bug.
