Deploys are compile-warmed off the actor thread and reach the four-slot
predecessor-stop queue in warm-completion order (cross-instance ordering is
not guaranteed by design). Since SR-P5 moved the config deserialization into
that warm task, the fifth-sent deploy often finishes warming before one of the
first four, takes a slot, and Queued4 terminated inside the 100 ms no-message
window (16/20 failures under parallel load). The test now waits for the four
in-flight predecessors to terminate, cancels the one still alive, and also
asserts the cancelled redeploy is answered Failed/superseded.
Joseph Doherty
e7896494f1