Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/3746#discussion_r116000971
--- Diff:
flink-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBase.java
---
@@ -503,23 +644,30 @@ public void close() throws Exception {
public void initializeState(FunctionInitializationContext context)
throws Exception {
OperatorStateStore stateStore = context.getOperatorStateStore();
- offsetsStateForCheckpoint =
stateStore.getSerializableListState(DefaultOperatorStateBackend.DEFAULT_OPERATOR_STATE_NAME);
- if (context.isRestored()) {
- if (restoredState == null) {
- restoredState = new HashMap<>();
- for (Tuple2<KafkaTopicPartition, Long>
kafkaOffset : offsetsStateForCheckpoint.get()) {
- restoredState.put(kafkaOffset.f0,
kafkaOffset.f1);
- }
+ ListState<Tuple2<KafkaTopicPartition, Long>>
oldRoundRobinListState =
+
stateStore.getSerializableListState(DefaultOperatorStateBackend.DEFAULT_OPERATOR_STATE_NAME);
- LOG.info("Setting restore state in the
FlinkKafkaConsumer.");
- if (LOG.isDebugEnabled()) {
- LOG.debug("Using the following offsets:
{}", restoredState);
- }
+ this.unionOffsetStates = stateStore.getUnionListState(new
ListStateDescriptor<>(
+ OFFSETS_STATE_NAME,
+ TypeInformation.of(new
TypeHint<Tuple2<KafkaTopicPartition, Long>>() {})));
+
+ if (context.isRestored() && !restoredFromOldState) {
+ restoredState = new TreeMap<>(new
KafkaTopicPartition.Comparator());
+
+ // migrate from 1.2 state, if there is any
+ for (Tuple2<KafkaTopicPartition, Long> kafkaOffset :
oldRoundRobinListState.get()) {
+ restoredFromOldState = true;
--- End diff --
Could it be that we restore from an old 1.2 snapshot and don't get anything
here because we simply weren't assigned any state. (For example because the
parallelism is higher than before.)
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