[ https://issues.apache.org/jira/browse/KAFKA-17017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17856928#comment-17856928 ]
Chia-Ping Tsai commented on KAFKA-17017: ---------------------------------------- [~lianetm] [~kirktrue] Could you please take a look? If AsyncConsumer#unsubscribe should not touch assigned partitions, we can update the docs to highlight that behavior changes. > AsyncConsumer#unsubscribe does not clean the assigned partitions > ---------------------------------------------------------------- > > Key: KAFKA-17017 > URL: https://issues.apache.org/jira/browse/KAFKA-17017 > Project: Kafka > Issue Type: Bug > Reporter: Chia-Ping Tsai > Assignee: Chia-Ping Tsai > Priority: Major > Labels: kip-848-client-support > > According to docs [0] `Consumer#unsubscribe` should clean both subscribed and > assigned partitions. However, there are two issues about `AsyncConsumer` > 1) if we don't set group id, `AsyncConsumer#unsubscribe`[1] will be no-op > 2) if we set group id, `AsyncConsumer` is always in `UNSUBSCRIBED` state and > so `MembershipManagerImpl#leaveGroup`[2] will be no-op > [0] > https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/consumer/KafkaConsumer.java#L759 > [1] > https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java#L1479 > [2] > https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/consumer/internals/MembershipManagerImpl.java#L666 -- This message was sent by Atlassian Jira (v8.20.10#820010)