@Test
    public void testHerderStopServicesClosesUponShutdown() {
        assertEquals(1, shutdownCalled.getCount());
        herder.stopServices();
        assertTrue(noneConnectorClientConfigOverridePolicy.isClosed());
        assertEquals(0, shutdownCalled.getCount());
    }
Issues multiple rapid fencing requests for a handful of connectors, each of which takes a little while to complete.
This mimics what might happen when a few connectors are reconfigured in quick succession and each task for the
connector needs to hit the leader with a fencing request during its preflight check.
connect/runtime/src/test/java/org/apache/kafka/connect/runtime/distributed/DistributedHerderTest.java