@Test
    public void testDescribeConsumerGroupNumRetries() throws Exception {
        final Cluster cluster = mockCluster(3, 0);
        final Time time = new MockTime();

        try (AdminClientUnitTestEnv env = new AdminClientUnitTestEnv(time, cluster,
            AdminClientConfig.RETRIES_CONFIG, "0")) {
            env.kafkaClient().setNodeApiVersions(NodeApiVersions.create());

            env.kafkaClient().prepareResponse(prepareFindCoordinatorResponse(Errors.NONE, env.cluster().controller()));

            DescribeGroupsResponseData data = new DescribeGroupsResponseData();

            data.groups().add(DescribeGroupsResponse.groupMetadata(
                GROUP_ID,
                Errors.NOT_COORDINATOR,
                "",
                "",
                "",
                Collections.emptyList(),
                Collections.emptySet()));
            env.kafkaClient().prepareResponse(new DescribeGroupsResponse(data));
            env.kafkaClient().prepareResponse(prepareFindCoordinatorResponse(Errors.NONE, env.cluster().controller()));

            final DescribeConsumerGroupsResult result = env.adminClient().describeConsumerGroups(singletonList(GROUP_ID));

            TestUtils.assertFutureError(result.all(), TimeoutException.class);
        }
    }
Test that we propagate exceptions encountered when fetching metadata.
clients/src/test/java/org/apache/kafka/clients/admin/KafkaAdminClientTest.java