clintropolis commented on a change in pull request #11006:
URL: https://github.com/apache/druid/pull/11006#discussion_r595748239
##########
File path:
extensions-core/kinesis-indexing-service/src/main/java/org/apache/druid/indexing/kinesis/KinesisRecordSupplier.java
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@@ -863,21 +863,36 @@ private Long getPartitionTimeLag(StreamPartition<String>
partition, String offse
iteratorType = ShardIteratorType.AT_SEQUENCE_NUMBER.toString();
offsetToUse = offset;
}
- String shardIterator = kinesis.getShardIterator(
- partition.getStream(),
- partition.getPartitionId(),
- iteratorType,
- offsetToUse
- ).getShardIterator();
- GetRecordsResult recordsResult = kinesis.getRecords(
- new GetRecordsRequest().withShardIterator(shardIterator).withLimit(1)
- );
+ GetRecordsResult recordsResult =
getRecords(ShardIteratorType.AFTER_SEQUENCE_NUMBER.toString(), offsetToUse,
partition);
+
+ // If no more new data after offsetToUse, it means there is no lag for
now.
+ // So report lag points as 0L.
+ if (recordsResult.getRecords().size() == 0) {
+ return 0L;
+ } else {
+ recordsResult = getRecords(iteratorType, offsetToUse, partition);
+ }
return recordsResult.getMillisBehindLatest();
});
}
+ private GetRecordsResult getRecords(String iteratorType, String offsetToUse,
StreamPartition<String> partition)
Review comment:
nit: might be nice to name this method `getRecordsForLag` or something
similar to indicate its limited purpose (the `.withLimit(1)` makes it probably
not really useful for actually getting records, nor does it need to be because
other methods are handling that)
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