Github user tzulitai commented on a diff in the pull request: https://github.com/apache/flink/pull/4187#discussion_r130058480 --- Diff: flink-connectors/flink-connector-kafka-0.8/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/Kafka08Fetcher.java --- @@ -346,15 +346,21 @@ protected TopicAndPartition createKafkaPartitionHandle(KafkaTopicPartition parti // ------------------------------------------------------------------------ @Override - public void commitInternalOffsetsToKafka(Map<KafkaTopicPartition, Long> offsets) throws Exception { + public void commitInternalOffsetsToKafka(Map<KafkaTopicPartition, Long> offsets, KafkaCommitCallback commitCallback) throws Exception { ZookeeperOffsetHandler zkHandler = this.zookeeperOffsetHandler; if (zkHandler != null) { try { // the ZK handler takes care of incrementing the offsets by 1 before committing zkHandler.prepareAndCommitOffsets(offsets); + if (commitCallback != null) { + commitCallback.onSuccess(); + } } catch (Exception e) { if (running) { + if (commitCallback != null) { --- End diff -- See my comment above. Would like to remove these null checks.
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