Tzu-Li (Gordon) Tai created FLINK-8410: ------------------------------------------
Summary: Kafka consumer's commitedOffsets gauge metric is prematurely set Key: FLINK-8410 URL: https://issues.apache.org/jira/browse/FLINK-8410 Project: Flink Issue Type: Bug Components: Kafka Connector, Metrics Affects Versions: 1.3.2, 1.4.0, 1.5.0 Reporter: Tzu-Li (Gordon) Tai Assignee: Tzu-Li (Gordon) Tai Fix For: 1.3.3, 1.5.0, 1.4.1 The {{committedOffset}} metric gauge value is set too early. It is set here: https://github.com/apache/flink/blob/master/flink-connectors/flink-connector-kafka-0.9/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/Kafka09Fetcher.java#L236 This sets the committed offset before the actual commit happens, which varies depending on whether the commit mode is auto periodically, or committed on checkpoints. Moreover, in the 0.9+ consumers, the {{KafkaConsumerThread}} may choose to supersede some commit attempts if the commit takes longer than the commit interval. While the committed offset back to Kafka is not a critical value used by the consumer, it will be best to have more accurate values as a Flink-shipped metric. -- This message was sent by Atlassian JIRA (v6.4.14#64029)