@Test
    public void testDeleteRecordsMultipleSends() throws Exception {
        String topic = "foo";
        TopicPartition tp0 = new TopicPartition(topic, 0);
        TopicPartition tp1 = new TopicPartition(topic, 1);

        MockTime time = new MockTime();

        try (AdminClientUnitTestEnv env = new AdminClientUnitTestEnv(time, mockCluster(3, 0))) {
            List<Node> nodes = env.cluster().nodes();

            List<MetadataResponse.PartitionMetadata> partitionMetadata = new ArrayList<>();
            partitionMetadata.add(new MetadataResponse.PartitionMetadata(Errors.NONE, tp0,
                    Optional.of(nodes.get(0).id()), Optional.of(5), singletonList(nodes.get(0).id()),
                    singletonList(nodes.get(0).id()), Collections.emptyList()));
            partitionMetadata.add(new MetadataResponse.PartitionMetadata(Errors.NONE, tp1,
                    Optional.of(nodes.get(1).id()), Optional.of(5), singletonList(nodes.get(1).id()),
                    singletonList(nodes.get(1).id()), Collections.emptyList()));

            List<MetadataResponse.TopicMetadata> topicMetadata = new ArrayList<>();
            topicMetadata.add(new MetadataResponse.TopicMetadata(Errors.NONE, topic, false, partitionMetadata));

            env.kafkaClient().prepareResponse(RequestTestUtils.metadataResponse(env.cluster().nodes(),
                    env.cluster().clusterResource().clusterId(), env.cluster().controller().id(), topicMetadata));

            env.kafkaClient().prepareResponseFrom(new DeleteRecordsResponse(new DeleteRecordsResponseData().setTopics(
                    new DeleteRecordsResponseData.DeleteRecordsTopicResultCollection(singletonList(new DeleteRecordsResponseData.DeleteRecordsTopicResult()
                            .setName(tp0.topic())
                            .setPartitions(new DeleteRecordsResponseData.DeleteRecordsPartitionResultCollection(singletonList(new DeleteRecordsResponseData.DeleteRecordsPartitionResult()
                                    .setPartitionIndex(tp0.partition())
                                    .setErrorCode(Errors.NONE.code())
                                    .setLowWatermark(3)).iterator()))).iterator()))), nodes.get(0));

            env.kafkaClient().disconnect(nodes.get(1).idString());
            env.kafkaClient().createPendingAuthenticationError(nodes.get(1), 100);

            Map<TopicPartition, RecordsToDelete> recordsToDelete = new HashMap<>();
            recordsToDelete.put(tp0, RecordsToDelete.beforeOffset(10L));
            recordsToDelete.put(tp1, RecordsToDelete.beforeOffset(10L));
            DeleteRecordsResult results = env.adminClient().deleteRecords(recordsToDelete);

            assertEquals(3L, results.lowWatermarks().get(tp0).get().lowWatermark());
            TestUtils.assertFutureThrows(results.lowWatermarks().get(tp1), AuthenticationException.class);
        }
    }
Test that we propagate exceptions encountered when fetching metadata.
clients/src/test/java/org/apache/kafka/clients/admin/KafkaAdminClientTest.java