[Spread-users] Concurrency issues with spread 4

[Johannes Wienke]

John Schultz wrote:
> I believe the problem still exists and it is due to you using RELIABLE_MESS to send the following message.  RELIABLE_MESS has no ordering guarantees with respect to other messages so it can be delivered before or after the join membership message.  Indeed, different members of the group may see the same message before and after the join membership from their perspectives.
> 
> If you want to ensure that the message is ordered wrt all membership changes, then you should use AGREED_MESS for the service type.  Join/leave/disconnect memberships are essentially AGREED_MESS's themselves.

Thank you very much. This makes sense.

Regards,
Johannes

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