dimitarndimitrov commented on code in PR #13432:
URL: https://github.com/apache/kafka/pull/13432#discussion_r1153335828


##########
clients/src/main/java/org/apache/kafka/clients/admin/internals/ListOffsetsHandler.java:
##########
@@ -0,0 +1,256 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.kafka.clients.admin.internals;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Predicate;
+import org.apache.kafka.clients.admin.ListOffsetsOptions;
+import org.apache.kafka.clients.admin.ListOffsetsResult.ListOffsetsResultInfo;
+import org.apache.kafka.clients.admin.OffsetSpec;
+import org.apache.kafka.clients.admin.OffsetSpec.TimestampSpec;
+import 
org.apache.kafka.clients.admin.internals.AdminApiFuture.SimpleAdminApiFuture;
+import org.apache.kafka.clients.admin.internals.AdminApiHandler.Batched;
+import org.apache.kafka.common.Node;
+import org.apache.kafka.common.TopicPartition;
+import org.apache.kafka.common.errors.ApiException;
+import org.apache.kafka.common.errors.InvalidMetadataException;
+import org.apache.kafka.common.errors.RetriableException;
+import org.apache.kafka.common.errors.UnsupportedVersionException;
+import 
org.apache.kafka.common.message.ListOffsetsRequestData.ListOffsetsPartition;
+import org.apache.kafka.common.message.ListOffsetsRequestData.ListOffsetsTopic;
+import 
org.apache.kafka.common.message.ListOffsetsResponseData.ListOffsetsPartitionResponse;
+import 
org.apache.kafka.common.message.ListOffsetsResponseData.ListOffsetsTopicResponse;
+import org.apache.kafka.common.protocol.Errors;
+import org.apache.kafka.common.requests.AbstractResponse;
+import org.apache.kafka.common.requests.ListOffsetsRequest;
+import org.apache.kafka.common.requests.ListOffsetsResponse;
+import org.apache.kafka.common.utils.LogContext;
+import org.slf4j.Logger;
+
+public final class ListOffsetsHandler extends Batched<TopicPartition, 
ListOffsetsResultInfo> {
+
+    private final ListOffsetsOptions options;
+    private final Map<TopicPartition, OffsetSpec> offsetSpecsByPartition;
+    private final Logger log;
+    private final AdminApiLookupStrategy<TopicPartition> lookupStrategy;
+
+    private volatile boolean skipMaxTimestampRequests = false;
+
+    public ListOffsetsHandler(
+        Map<TopicPartition, OffsetSpec> offsetSpecsByPartition,
+        ListOffsetsOptions options,
+        LogContext logContext
+    ) {
+        this.offsetSpecsByPartition = offsetSpecsByPartition;
+        this.options = options;
+        this.log = logContext.logger(ListOffsetsHandler.class);
+        this.lookupStrategy = new PartitionLeaderStrategy(logContext);
+    }
+
+    @Override
+    public String apiName() {
+        return "listOffsets";
+    }
+
+    @Override
+    public AdminApiLookupStrategy<TopicPartition> lookupStrategy() {
+        return this.lookupStrategy;
+    }
+
+    @Override
+    ListOffsetsRequest.Builder buildBatchedRequest(int brokerId, 
Set<TopicPartition> keys) {
+        final Map<String, ListOffsetsTopic> topicsByName = new HashMap<>();
+        boolean supportsMaxTimestamp = false;
+        for (TopicPartition topicPartition : keys) {
+            OffsetSpec offsetSpec = offsetSpecsByPartition.get(topicPartition);
+            long offsetQuery = getOffsetFromSpec(offsetSpec);
+            if (offsetQuery == ListOffsetsRequest.MAX_TIMESTAMP) {
+                if (skipMaxTimestampRequests) {
+                    continue;
+                }
+                supportsMaxTimestamp = true;
+            }
+            ListOffsetsTopic topic = topicsByName.computeIfAbsent(
+                topicPartition.topic(), topicName -> new 
ListOffsetsTopic().setName(topicName));
+            topic.partitions().add(
+                new ListOffsetsPartition()
+                    .setPartitionIndex(topicPartition.partition())
+                    .setTimestamp(offsetQuery));
+        }
+
+        return ListOffsetsRequest.Builder
+            .forConsumer(true, options.isolationLevel(), supportsMaxTimestamp)
+            .setTargetTimes(new ArrayList<>(topicsByName.values()));
+    }
+
+    @Override
+    public ApiResult<TopicPartition, ListOffsetsResultInfo> handleResponse(
+        Node broker,
+        Set<TopicPartition> keys,
+        AbstractResponse abstractResponse
+    ) {
+        ListOffsetsResponse response = (ListOffsetsResponse) abstractResponse;
+        Map<TopicPartition, ListOffsetsResultInfo> completed = new HashMap<>();
+        Map<TopicPartition, Throwable> failed = new HashMap<>();
+        List<TopicPartition> unmapped = new ArrayList<>();
+        Set<TopicPartition> retriable = new HashSet<>();
+
+        for (ListOffsetsTopicResponse topic : response.topics()) {
+            for (ListOffsetsPartitionResponse partition : topic.partitions()) {
+                TopicPartition topicPartition = new 
TopicPartition(topic.name(), partition.partitionIndex());
+                Errors error = Errors.forCode(partition.errorCode());
+                OffsetSpec offsetRequestSpec = 
offsetSpecsByPartition.get(topicPartition);
+                if (offsetRequestSpec == null) {
+                    log.warn("ListOffsets response includes unknown topic 
partition {}", topicPartition);
+                } else if (error == Errors.NONE) {
+                    Optional<Integer> leaderEpoch = (partition.leaderEpoch() 
== ListOffsetsResponse.UNKNOWN_EPOCH)
+                        ? Optional.empty()
+                        : Optional.of(partition.leaderEpoch());
+                    completed.put(
+                        topicPartition,
+                        new ListOffsetsResultInfo(partition.offset(), 
partition.timestamp(), leaderEpoch));
+                } else {
+                    handlePartitionError(topicPartition, error, failed, 
unmapped, retriable);
+                }
+            }
+        }
+
+        maybeMarkOtherFailures(
+            broker,
+            keys,
+            failed,
+            p -> !unmapped.isEmpty() || completed.containsKey(p) || 
failed.containsKey(p) || retriable.contains(p));
+
+        return new ApiResult<>(completed, failed, unmapped);
+    }
+
+    private void handlePartitionError(
+        TopicPartition topicPartition,
+        Errors error,
+        Map<TopicPartition, Throwable> failed,
+        List<TopicPartition> unmapped,
+        Set<TopicPartition> retriable
+    ) {
+        ApiException apiException = error.exception();
+        if (apiException instanceof InvalidMetadataException) {
+            log.debug(
+                "ListOffsets lookup request for topic partition {} will be 
retried due to invalid metadata",
+                topicPartition,
+                apiException);
+            unmapped.add(topicPartition);
+        } else if (apiException instanceof RetriableException) {
+            log.debug(
+                "ListOffsets fulfillment request for topic partition {} will 
be retried due to {}",
+                topicPartition,
+                apiException);
+            retriable.add(topicPartition);
+        } else {
+            log.error(
+                "ListOffsets request for topic partition {} failed due to an 
unexpected error",
+                topicPartition,
+                apiException);
+            failed.put(topicPartition, apiException);
+        }
+    }
+
+    private void maybeMarkOtherFailures(
+        Node broker,
+        Set<TopicPartition> keys,
+        Map<TopicPartition, Throwable> failed,
+        Predicate<TopicPartition> sanityCheck
+    ) {
+        Exception unsupportedMaxTimestampSpecException = new 
UnsupportedVersionException(
+            "Broker " + broker.id() + " does not support MAX_TIMESTAMP offset 
spec");
+        for (TopicPartition topicPartition : keys) {
+            // Fail any MAX_TIMESTAMP requests if we had to downgrade the 
original request
+            if (skipMaxTimestampRequests
+                && getOffsetFromSpec(
+                offsetSpecsByPartition.get(topicPartition)) == 
ListOffsetsRequest.MAX_TIMESTAMP
+            ) {
+                log.error(
+                    "ListOffsets request for topic partition {} failed due to 
unsupported version",
+                    topicPartition,
+                    unsupportedMaxTimestampSpecException);
+                failed.put(topicPartition, 
unsupportedMaxTimestampSpecException);
+            // Sanity-check if the current leader for these partitions 
returned results for all of them
+            } else if (!sanityCheck.test(topicPartition)) {
+                ApiException sanityCheckException = new ApiException(
+                    "The response from broker " + broker.id() +
+                        " did not contain a result for topic partition " + 
topicPartition);
+                log.error(
+                    "ListOffsets request for topic partition {} failed sanity 
check",
+                    topicPartition,
+                    unsupportedMaxTimestampSpecException);

Review Comment:
   The wrong exception is being logged here, should be `sanityCheckException`.



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