garyli1019 commented on a change in pull request #1377: [HUDI-663] Fix
HoodieDeltaStreamer offset not handled correctly
URL: https://github.com/apache/incubator-hudi/pull/1377#discussion_r388705608
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File path:
hudi-utilities/src/main/java/org/apache/hudi/utilities/sources/helpers/KafkaOffsetGen.java
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@@ -180,7 +180,7 @@ public KafkaOffsetGen(TypedProperties props) {
.map(x -> new TopicPartition(x.topic(),
x.partition())).collect(Collectors.toSet());
// Determine the offset ranges to read from
- if (lastCheckpointStr.isPresent()) {
+ if (lastCheckpointStr.isPresent() && !lastCheckpointStr.get().isEmpty())
{
Review comment:
I think this may potentially hide some concerning errors.
e.g. The delta streamer is consuming Kafka source, but a hidden bug happens
and stored an empty checkpoint. The next run will just ignore the empty
checkpoint and reset to the `LATEST`. Then there will be data loss
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