service_test.clj sometimes fails on travis

[mcorbin]

The error was:

FAIL in (threadpool-service-test) (service_test.clj:155)
stats

expected: (= (instrumentation/events s)
             [{:service "riemann executor cat accepted rate", :metric 3/5, :tags ["riemann"], :state "ok", :time 5}
              {:service "riemann executor cat completed rate", :metric 3/5, :tags ["riemann"], :state "ok", :time 5}
              {:service "riemann executor cat rejected rate", :metric 0, :tags ["riemann"], :state "ok", :time 5}
              {:service "riemann executor cat queue capacity", :metric 2, :tags ["riemann"], :state "ok", :time 5}
              {:service "riemann executor cat queue size", :metric 0, :tags ["riemann"], :state "ok", :time 5}
              {:service "riemann executor cat queue used", :metric 0, :tags ["riemann"], :state "ok", :time 5}
              {:service "riemann executor cat threads active", :metric 0, :tags ["riemann"], :state "ok", :time 5}
              {:service "riemann executor cat threads alive", :metric 1, :tags ["riemann"], :state "ok", :time 5}])

actual: (not (= [{:service "riemann executor cat accepted rate", :metric 3/5, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat completed rate", :metric 2/5, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat rejected rate", :metric 0, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat queue capacity", :metric 2, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat queue size", :metric 0, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat queue used", :metric 0, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat threads active", :metric 1, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat threads alive", :metric 1, :tags ["riemann"], :state "ok", :time 5}]

                [{:service "riemann executor cat accepted rate", :metric 3/5, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat completed rate", :metric 3/5, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat rejected rate", :metric 0, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat queue capacity", :metric 2, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat queue size", :metric 0, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat queue used", :metric 0, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat threads active", :metric 0, :tags ["riemann"], :state "ok", :time 5}
                 {:service "riemann executor cat threads alive", :metric 1, :tags ["riemann"], :state "ok", :time 5}]))

As you can see, the thread was still active and the test hasn't been fully processed (the test launched (dotimes [i 3] (run)) but stopped at 2.

I haven't be able to reproduce the bug locally yet.