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https://issues.apache.org/jira/browse/KAFKA-14362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17635370#comment-17635370
 ] 

Mikael commented on KAFKA-14362:
--------------------------------

When comparing successful test runs with those that generate duplicate 
consumption of messages, I noticed that in the success case, for the consumer 
that gets some of its partitions revoked, there is FIRST this log message:
{code:java}
2022-11-17 07:27:27,141 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
[ConsumerCoordinator.java:395] [Consumer 
clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
Updating assignment with
        Assigned partitions:                       
[messages.xms.mt.batch.report-3, messages.xms.mt.batch.report-0, 
messages.xms.mt.batch.report-2, messages.xms.mt.batch.report-1]
        Current owned partitions:                  
[messages.xms.mt.batch.report-4, messages.xms.mt.batch.report-3, 
messages.xms.mt.batch.report-6, messages.xms.mt.batch.report-5, 
messages.xms.mt.batch.report-0, messages.xms.mt.batch.report-2, m
essages.xms.mt.batch.report-1, messages.xms.mt.batch.report-7]
        Added partitions (assigned - owned):       []
        Revoked partitions (owned - assigned):     
[messages.xms.mt.batch.report-4, messages.xms.mt.batch.report-6, 
messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-7] {code}
and THEN a large number of this type of log message:
{code:java}
2022-11-17 07:27:27,149 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
[ConsumerCoordinator.java:1156] [Consumer 
clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
Failing OffsetCommit request since the consumer is not part of an active group 
{code}
whereas in the duplication case, at least one of the latter message is logged 
BEFORE the former one.

> Same message consumed by two consumers in the same group  after client restart
> ------------------------------------------------------------------------------
>
>                 Key: KAFKA-14362
>                 URL: https://issues.apache.org/jira/browse/KAFKA-14362
>             Project: Kafka
>          Issue Type: Bug
>          Components: clients
>    Affects Versions: 3.1.1
>         Environment: AWS EC2 CentOS Linux 3.10.0-1160.76.1.el7.x86_64
>            Reporter: Mikael
>            Priority: Major
>
> Trigger scenario:
> Two Kafka client application instances on separate EC2 instances with one 
> consumer each, consuming from the same 8 partition topic using the same group 
> ID. Duplicate consumption of a handful of messages sometimes happens right 
> after one of the application instances has been restarted.
> Additional information:
> Messages are produced to the topic by a Kafka streams topology deployed on 
> four application instances. I have verified that each message is only 
> produced once by enabling debug logging in the topology flow right before 
> producing each message to the topic.
> Example logs below are from a test run when a batch of 11 messages were 
> consumed at 10:28:26,771 on the restarted instance and 9 of them were 
> consumed as part of a larger batch at 10:28:23,824 on the other instance. 
> Application shutdown was initiated at  10:27:13,086 and completed at 
> 10:27:15,164, startup was initiated at 10:28:05,029 and completed at 
> 10:28:37,491.
> Kafka consumer group logs after restart on the instance that was restarted:
>  
> {code:java}
> 2022-11-07 10:28:23,678 INFO [consumer-0-C-1] o.a.k.c.Metadata 
> [Metadata.java:287] [Consumer clientId=consumer-xms-batch-mt-callback-3, 
> groupId=xms-batch-mt-callback] Cluster ID: B7Q1-xJpQW6EGbp35t2VnA
> 2022-11-07 10:28:23,678 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:853] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Discovered group coordinator 
> b-1.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094 (id: 
> 2147483646 rack: null)
> 2022-11-07 10:28:23,688 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:535] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> (Re-)joining group
> 2022-11-07 10:28:23,736 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:1000] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Request joining group due to: need to re-join with the given member-id
> 2022-11-07 10:28:23,737 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:535] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> (Re-)joining group
> 2022-11-07 10:28:23,797 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:595] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully joined group with generation Generation{generationId=676, 
> memberId='consumer-xms-batch-mt-callback-3-bfceacd5-99de-44d5-9a36-eae6e5d99243',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:28:23,835 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:761] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully synced group in generation Generation{generationId=676, 
> memberId='consumer-xms-batch-mt-callback-3-bfceacd5-99de-44d5-9a36-eae6e5d99243',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:28:23,838 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:395] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Updating assignment with
>         Assigned partitions:                       []
>         Current owned partitions:                  []
>         Added partitions (assigned - owned):       []
>         Revoked partitions (owned - assigned):     []
> 2022-11-07 10:28:23,838 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:279] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Notifying assignor about the new Assignment(partitions=[])
> 2022-11-07 10:28:23,838 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:291] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Adding newly assigned partitions: 
> 2022-11-07 10:28:25,315 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:1000] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Request joining group due to: group is already rebalancing
> 2022-11-07 10:28:25,317 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:535] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> (Re-)joining group
> 2022-11-07 10:28:25,319 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:595] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully joined group with generation Generation{generationId=677, 
> memberId='consumer-xms-batch-mt-callback-3-bfceacd5-99de-44d5-9a36-eae6e5d99243',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:28:25,327 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:761] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully synced group in generation Generation{generationId=677, 
> memberId='consumer-xms-batch-mt-callback-3-bfceacd5-99de-44d5-9a36-eae6e5d99243',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:28:25,327 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:395] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Updating assignment with
>         Assigned partitions:                       
> [messages.xms.mt.batch.report-4, messages.xms.mt.batch.report-6, 
> messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-7]
>         Current owned partitions:                  []
>         Added partitions (assigned - owned):       
> [messages.xms.mt.batch.report-4, messages.xms.mt.batch.report-6, 
> messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-7]
>         Revoked partitions (owned - assigned):     []
> 2022-11-07 10:28:25,327 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:279] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Notifying assignor about the new 
> Assignment(partitions=[messages.xms.mt.batch.report-4, 
> messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-6, 
> messages.xms.mt.batch.report-7])
> 2022-11-07 10:28:25,327 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:291] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Adding newly assigned partitions: messages.xms.mt.batch.report-4, 
> messages.xms.mt.batch.report-6, messages.xms.mt.batch.report-5, 
> messages.xms.mt.batch.report-7
> 2022-11-07 10:28:25,365 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:846] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Setting offset for partition messages.xms.mt.batch.report-4 to the committed 
> offset FetchPosition{offset=55456568, offsetEpoch=Optional.empty, 
> currentLeader=LeaderAndEpoch{leader=Optional[b-2.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094
>  (id: 2 rack: use1-az1)], epoch=55}}
> 2022-11-07 10:28:25,365 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:846] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Setting offset for partition messages.xms.mt.batch.report-6 to the committed 
> offset FetchPosition{offset=55817359, offsetEpoch=Optional.empty, 
> currentLeader=LeaderAndEpoch{leader=Optional[b-1.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094
>  (id: 1 rack: use1-az6)], epoch=53}}
> 2022-11-07 10:28:25,370 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:846] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Setting offset for partition messages.xms.mt.batch.report-5 to the committed 
> offset FetchPosition{offset=55700347, offsetEpoch=Optional.empty, 
> currentLeader=LeaderAndEpoch{leader=Optional[b-3.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094
>  (id: 3 rack: use1-az4)], epoch=53}}
> 2022-11-07 10:28:25,371 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:846] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Setting offset for partition messages.xms.mt.batch.report-7 to the committed 
> offset FetchPosition{offset=55642775, offsetEpoch=Optional.empty, 
> currentLeader=LeaderAndEpoch{leader=Optional[b-2.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094
>  (id: 2 rack: use1-az1)], epoch=55}} {code}
> Kafka consumer group logs before and after the restart on the other instance:
>  
>  
> {code:java}
> 2022-11-07 10:27:14,618 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:1000] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Request joining group due to: group is already rebalancing
> 2022-11-07 10:27:14,622 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:535] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> (Re-)joining group
> 2022-11-07 10:27:14,623 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:595] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully joined group with generation Generation{generationId=675, 
> memberId='consumer-xms-batch-mt-callback-3-22806c53-d6ce-4f58-b86d-65496f7a63bd',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:27:14,623 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:654] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Finished assignment for group at generation 675: 
> {consumer-xms-batch-mt-callback-3-22806c53-d6ce-4f58-b86d-65496f7a63bd=Assignment(partitions=[messages.xms.mt.batch.report-4,
>  messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-6, 
> messages.xms.mt.batch.report-7, messages.xms.mt.batch.report-0, 
> messages.xms.mt.batch.report-1, messages.xms.mt.batch.report-2, 
> messages.xms.mt.batch.report-3])}
> 2022-11-07 10:27:14,627 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:761] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully synced group in generation Generation{generationId=675, 
> memberId='consumer-xms-batch-mt-callback-3-22806c53-d6ce-4f58-b86d-65496f7a63bd',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:27:14,627 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:395] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Updating assignment with
>         Assigned partitions:                       
> [messages.xms.mt.batch.report-4, messages.xms.mt.batch.report-3, 
> messages.xms.mt.batch.report-6, messages.xms.mt.batch.report-5, 
> messages.xms.mt.batch.report-0, messages.xms.mt.batch.report-2, 
> messages.xms.mt.batch.report-1, messages.xms.mt.batch.report-7]
>         Current owned partitions:                  
> [messages.xms.mt.batch.report-4, messages.xms.mt.batch.report-6, 
> messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-7]
>         Added partitions (assigned - owned):       
> [messages.xms.mt.batch.report-3, messages.xms.mt.batch.report-0, 
> messages.xms.mt.batch.report-2, messages.xms.mt.batch.report-1]
>         Revoked partitions (owned - assigned):     []
> 2022-11-07 10:27:14,627 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:279] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Notifying assignor about the new 
> Assignment(partitions=[messages.xms.mt.batch.report-4, 
> messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-6, 
> messages.xms.mt.batch.report-7, messages.xms.mt.batch.report-0, 
> messages.xms.mt.batch.report-1, messages.xms.mt.batch.report-2, 
> messages.xms.mt.batch.report-3])
> 2022-11-07 10:27:14,627 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:291] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Adding newly assigned partitions: messages.xms.mt.batch.report-3, 
> messages.xms.mt.batch.report-0, messages.xms.mt.batch.report-2, 
> messages.xms.mt.batch.report-1
> 2022-11-07 10:27:14,627 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:846] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Setting offset for partition messages.xms.mt.batch.report-3 to the committed 
> offset FetchPosition{offset=55784517, offsetEpoch=Optional.empty, 
> currentLeader=LeaderAndEpoch{leader=Optional[b-1.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094
>  (id: 1 rack: use1-az6)], epoch=53}}
> 2022-11-07 10:27:14,627 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:846] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Setting offset for partition messages.xms.mt.batch.report-0 to the committed 
> offset FetchPosition{offset=55502621, offsetEpoch=Optional.empty, 
> currentLeader=LeaderAndEpoch{leader=Optional[b-3.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094
>  (id: 3 rack: use1-az4)], epoch=66}}
> 2022-11-07 10:27:14,627 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:846] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Setting offset for partition messages.xms.mt.batch.report-2 to the committed 
> offset FetchPosition{offset=55713067, offsetEpoch=Optional.empty, 
> currentLeader=LeaderAndEpoch{leader=Optional[b-3.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094
>  (id: 3 rack: use1-az4)], epoch=54}}
> 2022-11-07 10:27:14,627 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:846] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Setting offset for partition messages.xms.mt.batch.report-1 to the committed 
> offset FetchPosition{offset=55457508, offsetEpoch=Optional.empty, 
> currentLeader=LeaderAndEpoch{leader=Optional[b-2.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094
>  (id: 2 rack: use1-az1)], epoch=55}}
> 2022-11-07 10:28:23,810 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:1000] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Request joining group due to: group is already rebalancing
> 2022-11-07 10:28:23,813 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:535] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> (Re-)joining group
> 2022-11-07 10:28:23,824 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:1156] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Failing OffsetCommit request since the consumer is not part of an active group
> 2022-11-07 10:28:23,824 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:595] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully joined group with generation Generation
> {generationId=676, 
> memberId='consumer-xms-batch-mt-callback-3-22806c53-d6ce-4f58-b86d-65496f7a63bd',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:28:23,825 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:654] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Finished assignment for group at generation 676: 
> {consumer-xms-batch-mt-callback-3-bfceacd5-99de-44d5-9a36-eae6e5d99243=Assignment(partitions=[]),
>  
> consumer-xms-batch-mt-callback-3-22806c53-d6ce-4f58-b86d-65496f7a63bd=Assignment(partitions=[messages.xms.mt.batch.report-0,
>  messages.xms.mt.batch.report-1, messages.xms.mt.batch.report-2, 
> messages.xms.mt.batch.report-3])}
> 2022-11-07 10:28:23,828 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:761] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully synced group in generation Generation{generationId=676, 
> memberId='consumer-xms-batch-mt-callback-3-22806c53-d6ce-4f58-b86d-65496f7a63bd',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:28:23,829 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:395] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Updating assignment with
>         Assigned partitions:                       
> [messages.xms.mt.batch.report-3, messages.xms.mt.batch.report-0, 
> messages.xms.mt.batch.report-2, messages.xms.mt.batch.report-1]
>         Current owned partitions:                  
> [messages.xms.mt.batch.report-4, messages.xms.mt.batch.report-3, 
> messages.xms.mt.batch.report-6, messages.xms.mt.batch.report-5, 
> messages.xms.mt.batch.report-0, messages.xms.mt.batch.report-2, 
> messages.xms.mt.batch.report-1, messages.xms.mt.batch.report-7]
>         Added partitions (assigned - owned):       []
>         Revoked partitions (owned - assigned):     
> [messages.xms.mt.batch.report-4, messages.xms.mt.batch.report-6, 
> messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-7]
> 2022-11-07 10:28:23,829 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:310] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Revoke previously assigned partitions messages.xms.mt.batch.report-4, 
> messages.xms.mt.batch.report-6, messages.xms.mt.batch.report-5, 
> messages.xms.mt.batch.report-7
> 2022-11-07 10:28:23,830 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:1000] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Request joining group due to: need to revoke partitions 
> [messages.xms.mt.batch.report-4, messages.xms.mt.batch.report-6, 
> messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-7] as indicated 
> by the current assignment and re-join
> 2022-11-07 10:28:23,830 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:279] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Notifying assignor about the new 
> Assignment(partitions=[messages.xms.mt.batch.report-0, 
> messages.xms.mt.batch.report-1, messages.xms.mt.batch.report-2, 
> messages.xms.mt.batch.report-3])
> 2022-11-07 10:28:23,830 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:291] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Adding newly assigned partitions: 
> 2022-11-07 10:28:23,830 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:535] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> (Re-)joining group
> 2022-11-07 10:28:23,849 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:1156] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Failing OffsetCommit request since the consumer is not part of an active group
> …
> Repeated 211 times
> …
> 2022-11-07 10:28:25,342 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:1156] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Failing OffsetCommit request since the consumer is not part of an active group
> 2022-11-07 10:28:25,342 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:595] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully joined group with generation Generation{generationId=677, 
> memberId='consumer-xms-batch-mt-callback-3-22806c53-d6ce-4f58-b86d-65496f7a63bd',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:28:25,343 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:654] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Finished assignment for group at generation 677: 
> {consumer-xms-batch-mt-callback-3-bfceacd5-99de-44d5-9a36-eae6e5d99243=Assignment(partitions=[messages.xms.mt.batch.report-4,
>  messages.xms.mt.batch.report-5, messages.xms.mt.batch.report-6, 
> messages.xms.mt.batch.report-7]), 
> consumer-xms-batch-mt-callback-3-22806c53-d6ce-4f58-b86d-65496f7a63bd=Assignment(partitions=[messages.xms.mt.batch.report-0,
>  messages.xms.mt.batch.report-1, messages.xms.mt.batch.report-2, 
> messages.xms.mt.batch.report-3])}
> 2022-11-07 10:28:25,347 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [AbstractCoordinator.java:761] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Successfully synced group in generation Generation{generationId=677, 
> memberId='consumer-xms-batch-mt-callback-3-22806c53-d6ce-4f58-b86d-65496f7a63bd',
>  protocol='cooperative-sticky'}
> 2022-11-07 10:28:25,347 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:395] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Updating assignment with
>         Assigned partitions:                       
> [messages.xms.mt.batch.report-3, messages.xms.mt.batch.report-0, 
> messages.xms.mt.batch.report-2, messages.xms.mt.batch.report-1]
>         Current owned partitions:                  
> [messages.xms.mt.batch.report-3, messages.xms.mt.batch.report-0, 
> messages.xms.mt.batch.report-2, messages.xms.mt.batch.report-1]
>         Added partitions (assigned - owned):       []
>         Revoked partitions (owned - assigned):     []
> 2022-11-07 10:28:25,347 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:279] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Notifying assignor about the new 
> Assignment(partitions=[messages.xms.mt.batch.report-0, 
> messages.xms.mt.batch.report-1, messages.xms.mt.batch.report-2, 
> messages.xms.mt.batch.report-3])
> 2022-11-07 10:28:25,347 INFO [consumer-0-C-1] o.a.k.c.c.i.ConsumerCoordinator 
> [ConsumerCoordinator.java:291] [Consumer 
> clientId=consumer-xms-batch-mt-callback-3, groupId=xms-batch-mt-callback] 
> Adding newly assigned partitions:  {code}
> Consumer configuration on restarted instance:
>  
>  
> {code:java}
>         allow.auto.create.topics = true
>         auto.commit.interval.ms = 5000
>         auto.offset.reset = earliest
>         bootstrap.servers = 
> [b-3.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094, 
> b-1.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094, 
> b-2.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094]
>         check.crcs = true
>         client.dns.lookup = use_all_dns_ips
>         client.id = consumer-xms-batch-mt-callback-3
>         client.rack = 
>         connections.max.idle.ms = 540000
>         default.api.timeout.ms = 60000
>         enable.auto.commit = false
>         exclude.internal.topics = true
>         fetch.max.bytes = 52428800
>         fetch.max.wait.ms = 500
>         fetch.min.bytes = 1
>         group.id = xms-batch-mt-callback
>         group.instance.id = null
>         heartbeat.interval.ms = 1500
>         interceptor.classes = []
>         internal.leave.group.on.close = true
>         internal.throw.on.fetch.stable.offset.unsupported = false
>         isolation.level = read_committed
>         key.deserializer = class 
> org.apache.kafka.common.serialization.StringDeserializer
>         max.partition.fetch.bytes = 1048576
>         max.poll.interval.ms = 300000
>         max.poll.records = 1000
>         metadata.max.age.ms = 300000
>         metric.reporters = []
>         metrics.num.samples = 2
>         metrics.recording.level = INFO
>         metrics.sample.window.ms = 30000
>         partition.assignment.strategy = [class 
> org.apache.kafka.clients.consumer.CooperativeStickyAssignor]
>         receive.buffer.bytes = 65536
>         reconnect.backoff.max.ms = 1000
>         reconnect.backoff.ms = 50
>         request.timeout.ms = 30000
>         retry.backoff.ms = 100
>         sasl.client.callback.handler.class = null
>         sasl.jaas.config = null
>         sasl.kerberos.kinit.cmd = /usr/bin/kinit
>         sasl.kerberos.min.time.before.relogin = 60000
>         sasl.kerberos.service.name = null
>         sasl.kerberos.ticket.renew.jitter = 0.05
>         sasl.kerberos.ticket.renew.window.factor = 0.8
>         sasl.login.callback.handler.class = null
>         sasl.login.class = null
>         sasl.login.connect.timeout.ms = null
>         sasl.login.read.timeout.ms = null
>         sasl.login.refresh.buffer.seconds = 300
>         sasl.login.refresh.min.period.seconds = 60
>         sasl.login.refresh.window.factor = 0.8
>         sasl.login.refresh.window.jitter = 0.05
>         sasl.login.retry.backoff.max.ms = 10000
>         sasl.login.retry.backoff.ms = 100
>         sasl.mechanism = GSSAPI
>         sasl.oauthbearer.clock.skew.seconds = 30
>         sasl.oauthbearer.expected.audience = null
>         sasl.oauthbearer.expected.issuer = null
>         sasl.oauthbearer.jwks.endpoint.refresh.ms = 3600000
>         sasl.oauthbearer.jwks.endpoint.retry.backoff.max.ms = 10000
>         sasl.oauthbearer.jwks.endpoint.retry.backoff.ms = 100
>         sasl.oauthbearer.jwks.endpoint.url = null
>         sasl.oauthbearer.scope.claim.name = scope
>         sasl.oauthbearer.sub.claim.name = sub
>         sasl.oauthbearer.token.endpoint.url = null
>         security.protocol = SSL
>         security.providers = null
>         send.buffer.bytes = 131072
>         session.timeout.ms = 6000
>         socket.connection.setup.timeout.max.ms = 30000
>         socket.connection.setup.timeout.ms = 10000
>         ssl.cipher.suites = null
>         ssl.enabled.protocols = [TLSv1.2, TLSv1.3]
>         ssl.endpoint.identification.algorithm = https
>         ssl.engine.factory.class = null
>         ssl.key.password = null
>         ssl.keymanager.algorithm = SunX509
>         ssl.keystore.certificate.chain = null
>         ssl.keystore.key = null
>         ssl.keystore.location = /opt/apps/msl/xms-gateway/conf/xms.us1tst.jks
>         ssl.keystore.password = [hidden]
>         ssl.keystore.type = JKS
>         ssl.protocol = TLSv1.3
>         ssl.provider = null
>         ssl.secure.random.implementation = null
>         ssl.trustmanager.algorithm = PKIX
>         ssl.truststore.certificates = null
>         ssl.truststore.location = null
>         ssl.truststore.password = null
>         ssl.truststore.type = JKS
>         value.deserializer = class 
> com.sinch.xms.model.kafka.serdes.MtBatchDeliveryReportDeserializer {code}
> Consumer configuration on the other instance:
> {code:java}
>         allow.auto.create.topics = true
>         auto.commit.interval.ms = 5000
>         auto.offset.reset = earliest
>         bootstrap.servers = 
> [b-3.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094, 
> b-1.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094, 
> b-2.us1tst-eventbus.ujvxjq.c5.kafka.us-east-1.amazonaws.com:9094]
>         check.crcs = true
>         client.dns.lookup = use_all_dns_ips
>         client.id = consumer-xms-batch-mt-callback-3
>         client.rack = 
>         connections.max.idle.ms = 540000
>         default.api.timeout.ms = 60000
>         enable.auto.commit = false
>         exclude.internal.topics = true
>         fetch.max.bytes = 52428800
>         fetch.max.wait.ms = 500
>         fetch.min.bytes = 1
>         group.id = xms-batch-mt-callback
>         group.instance.id = null
>         heartbeat.interval.ms = 1500
>         interceptor.classes = []
>         internal.leave.group.on.close = true
>         internal.throw.on.fetch.stable.offset.unsupported = false
>         isolation.level = read_committed
>         key.deserializer = class 
> org.apache.kafka.common.serialization.StringDeserializer
>         max.partition.fetch.bytes = 1048576
>         max.poll.interval.ms = 300000
>         max.poll.records = 1000
>         metadata.max.age.ms = 300000
>         metric.reporters = []
>         metrics.num.samples = 2
>         metrics.recording.level = INFO
>         metrics.sample.window.ms = 30000
>         partition.assignment.strategy = [class 
> org.apache.kafka.clients.consumer.CooperativeStickyAssignor]
>         receive.buffer.bytes = 65536
>         reconnect.backoff.max.ms = 1000
>         reconnect.backoff.ms = 50
>         request.timeout.ms = 30000
>         retry.backoff.ms = 100
>         sasl.client.callback.handler.class = null
>         sasl.jaas.config = null
>         sasl.kerberos.kinit.cmd = /usr/bin/kinit
>         sasl.kerberos.min.time.before.relogin = 60000
>         sasl.kerberos.service.name = null
>         sasl.kerberos.ticket.renew.jitter = 0.05
>         sasl.kerberos.ticket.renew.window.factor = 0.8
>         sasl.login.callback.handler.class = null
>         sasl.login.class = null
>         sasl.login.connect.timeout.ms = null
>         sasl.login.read.timeout.ms = null
>         sasl.login.refresh.buffer.seconds = 300
>         sasl.login.refresh.min.period.seconds = 60
>         sasl.login.refresh.window.factor = 0.8
>         sasl.login.refresh.window.jitter = 0.05
>         sasl.login.retry.backoff.max.ms = 10000
>         sasl.login.retry.backoff.ms = 100
>         sasl.mechanism = GSSAPI
>         sasl.oauthbearer.clock.skew.seconds = 30
>         sasl.oauthbearer.expected.audience = null
>         sasl.oauthbearer.expected.issuer = null
>         sasl.oauthbearer.jwks.endpoint.refresh.ms = 3600000
>         sasl.oauthbearer.jwks.endpoint.retry.backoff.max.ms = 10000
>         sasl.oauthbearer.jwks.endpoint.retry.backoff.ms = 100
>         sasl.oauthbearer.jwks.endpoint.url = null
>         sasl.oauthbearer.scope.claim.name = scope
>         sasl.oauthbearer.sub.claim.name = sub
>         sasl.oauthbearer.token.endpoint.url = null
>         security.protocol = SSL
>         security.providers = null
>         send.buffer.bytes = 131072
>         session.timeout.ms = 6000
>         socket.connection.setup.timeout.max.ms = 30000
>         socket.connection.setup.timeout.ms = 10000
>         ssl.cipher.suites = null
>         ssl.enabled.protocols = [TLSv1.2, TLSv1.3]
>         ssl.endpoint.identification.algorithm = https
>         ssl.engine.factory.class = null
>         ssl.key.password = null
>         ssl.keymanager.algorithm = SunX509
>         ssl.keystore.certificate.chain = null
>         ssl.keystore.key = null
>         ssl.keystore.location = /opt/apps/msl/xms-gateway/conf/xms.us1tst.jks
>         ssl.keystore.password = [hidden]
>         ssl.keystore.type = JKS
>         ssl.protocol = TLSv1.3
>         ssl.provider = null
>         ssl.secure.random.implementation = null
>         ssl.trustmanager.algorithm = PKIX
>         ssl.truststore.certificates = null
>         ssl.truststore.location = null
>         ssl.truststore.password = null
>         ssl.truststore.type = JKS
>         value.deserializer = class 
> com.sinch.xms.model.kafka.serdes.MtBatchDeliveryReportDeserializer {code}
>  



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