We use Rendezvous to send information from one thread to another in the same process. It seems that we drop a few messages per session (hundreds of thousands or millions of messages). I could not find any obvious fault in our own code, so I am asking the community: Rendezvous is not a guaranteed delivery service (unless you specify that you want it that way). How likely is it to drop messages in this context? Anyone experienced this before? Is there anything to configure?