Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/1341#discussion_r44530703
--- Diff:
flink-streaming-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumer.java
---
@@ -449,6 +481,8 @@ public void close() throws Exception {
@Override
public long[] snapshotState(long checkpointId, long
checkpointTimestamp) throws Exception {
+ Preconditions.checkState(offsetCommitter == null, "Periodic
offset committer and checkpointing can not be enabled at the same time");
--- End diff --
The other preconditions functions are statically imported. Would be nice to
follow one style within a class.
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