Github user tzulitai commented on a diff in the pull request:
https://github.com/apache/flink/pull/4357#discussion_r128147294
--- Diff:
flink-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBase.java
---
@@ -517,16 +519,13 @@ public void
initializeState(FunctionInitializationContext context) throws Except
LOG.debug("Using the following offsets:
{}", restoredState);
}
}
- if (restoredState != null && restoredState.isEmpty()) {
- restoredState = null;
- }
} else {
LOG.info("No restore state for FlinkKafkaConsumer.");
}
}
@Override
- public void snapshotState(FunctionSnapshotContext context) throws
Exception {
+ public final void snapshotState(FunctionSnapshotContext context) throws
Exception {
--- End diff --
@stevenzwu the snapshotState method was actually never intended to be
overriden, hence making it final here to state that clearly. For example, the
verrsion-specific implementations for `FlinkKafkaConsumerBase` may override
that and have incorrect implementations, where as our tests would never realize
it.
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