@Test
    public void testRemoveMembersFromGroupDefaultReason() throws Exception {
        testRemoveMembersFromGroup(null, DEFAULT_LEAVE_GROUP_REASON);
        testRemoveMembersFromGroup("", DEFAULT_LEAVE_GROUP_REASON);
    }
Test that we propagate exceptions encountered when fetching metadata.
clients/src/test/java/org/apache/kafka/clients/admin/KafkaAdminClientTest.java