@Override
            public Boolean call() throws Exception {
                return consumerConfig.getConsumerBootstrap().getCluster().getConnectionHolder().isAvailableEmpty();
            }
@author <a href="mailto:zhanggeng.zg@antfin.com">GengZhang</a>
test/test-integration/src/test/java/com/alipay/sofa/rpc/test/client/ReconnectTest.java