ZihanLi58 commented on code in PR #3798:
URL: https://github.com/apache/gobblin/pull/3798#discussion_r1372358132
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gobblin-modules/gobblin-kafka-common/src/main/java/org/apache/gobblin/source/extractor/extract/kafka/KafkaSource.java:
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@@ -257,32 +277,42 @@ public String apply(KafkaTopic topic) {
Stopwatch createWorkUnitStopwatch = Stopwatch.createStarted();
for (KafkaTopic topic : topics) {
+ LOG.info("Discovered topic " + topic);
+ if (topic.getTopicSpecificState().isPresent()) {
+ topicSpecificStateMap.computeIfAbsent(topic.getName(), k -> new
State())
+ .addAllIfNotExist(topic.getTopicSpecificState().get());
+ }
+ Optional<Set<Integer>> partitionIDSet = Optional.absent();
+ if(filteredTopicPartition.isPresent()) {
+ List<Integer> list =
java.util.Optional.ofNullable(filteredTopicPartitionMap.get(topic.getName()))
+ .orElse(new ArrayList<>());
+ partitionIDSet = Optional.of(new HashSet<>(list));
+ LOG.info("Compute the workunit for topic {} with num of filtered
partitions: {}",
+ topic.getName(), list.size());
+ }
+
threadPool.submit(
new WorkUnitCreator(topic, state,
Optional.fromNullable(topicSpecificStateMap.get(topic.getName())),
- workUnits));
+ kafkaTopicWorkunitMap, partitionIDSet));
}
ExecutorsUtils.shutdownExecutorService(threadPool, Optional.of(LOG), 1L,
TimeUnit.HOURS);
- LOG.info(String.format("Created workunits for %d topics in %d seconds",
workUnits.size(),
+ LOG.info(String.format("Created workunits for %d topics in %d seconds",
kafkaTopicWorkunitMap.size(),
createWorkUnitStopwatch.elapsed(TimeUnit.SECONDS)));
// Create empty WorkUnits for skipped partitions (i.e., partitions that
have previous offsets,
// but aren't processed).
- createEmptyWorkUnitsForSkippedPartitions(workUnits,
topicSpecificStateMap, state);
- //determine the number of mappers
- int maxMapperNum =
- state.getPropAsInt(ConfigurationKeys.MR_JOB_MAX_MAPPERS_KEY,
ConfigurationKeys.DEFAULT_MR_JOB_MAX_MAPPERS);
+ createEmptyWorkUnitsForSkippedPartitions(kafkaTopicWorkunitMap,
topicSpecificStateMap, state);
+
KafkaWorkUnitPacker kafkaWorkUnitPacker =
KafkaWorkUnitPacker.getInstance(this, state, Optional.of(this.metricContext));
- int numOfMultiWorkunits = maxMapperNum;
- if(state.contains(ConfigurationKeys.MR_TARGET_MAPPER_SIZE)) {
- double totalEstDataSize =
kafkaWorkUnitPacker.setWorkUnitEstSizes(workUnits);
- LOG.info(String.format("The total estimated data size is %.2f",
totalEstDataSize));
- double targetMapperSize =
state.getPropAsDouble(ConfigurationKeys.MR_TARGET_MAPPER_SIZE);
- numOfMultiWorkunits = (int) (totalEstDataSize / targetMapperSize) + 1;
- numOfMultiWorkunits = Math.min(numOfMultiWorkunits, maxMapperNum);
+ int numOfMultiWorkunits = minContainer.or(0);
+ if(state.contains(ConfigurationKeys.MR_JOB_MAX_MAPPERS_KEY)) {
+ numOfMultiWorkunits = Math.max(numOfMultiWorkunits,
+ calculateNumMappersForPacker(state, kafkaWorkUnitPacker,
kafkaTopicWorkunitMap));
}
- addTopicSpecificPropsToWorkUnits(workUnits, topicSpecificStateMap);
- List<WorkUnit> workUnitList = kafkaWorkUnitPacker.pack(workUnits,
numOfMultiWorkunits);
+
+ addTopicSpecificPropsToWorkUnits(kafkaTopicWorkunitMap,
topicSpecificStateMap);
+ List<WorkUnit> workUnitList =
kafkaWorkUnitPacker.pack(kafkaTopicWorkunitMap, numOfMultiWorkunits);
Review Comment:
I would rather suggest to keep the logic there simple but make sure when you
call the method, you just call it for one single topic(or even one single
failed task) at one time "split" the original work unit.
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