[英]How to get Consumer Lag for a consumer group in kafka in java
I want to know the consumer lag for a consumer group using java. 我想知道使用java的消费者群体的消费者滞后。 I have tried using 我试过用
kafka-consumer-groups --describe --bootstrap-server localhost:9092 --group MyGroupName
and the lag is visible. 并且滞后是可见的。
How do i do this in Java ? 我如何用Java做到这一点?
I have tried using the org.apache.kafka.clients.admin.AdminClient
, but could not get the lag per consumer group. 我尝试过使用org.apache.kafka.clients.admin.AdminClient
,但无法获得每个使用者组的延迟。
i am using confluent 5.0.1 which has kafka 2.0.1 org.apache.kafka - kafka-clients - 2.0.1
我正在使用confluent 5.0.1 which has kafka 2.0.1 org.apache.kafka - kafka-clients - 2.0.1
Lag is approximately endOffset-currentOffset
. 滞后大约是endOffset-currentOffset
。 You can use 您可以使用
AdminClient.listConsumerGroupOffsets("MyGroupName").partitionsToOffsetAndMetadata()
to get the current offset for the group. 获取组的当前偏移量。 To get the end offsets you need to create KafkaConsumer for the topic and use 要获得结束偏移,您需要为主题和使用创建KafkaConsumer
KafkaConsumer.endOffsets(partitions)
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