log.info("client added callback handler");
client.invoke(CALLBACK_TEST);
assertEquals(2, callbackHandler.callbackCounter);
client.removeListener(callbackHandler);
client.disconnect();
// The ControlMonitorTimerTask from the first callback handler tries to recreate
// its control connection, which adds an entry to
// BisocketClientInvoker.listenerIdToSocketsMap which cannot be removed, which