[ 
https://issues.apache.org/jira/browse/KAFKA-5611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

qiuyueqiong updated KAFKA-5611:
-------------------------------
    Comment: was deleted

(was: after appy 
[{color:#0066cc}https://github.com/apache/kafka/pull/3571{color}] on version 
0.10.2.0, we encounter this {color:#333333}problem{color}:

java.lang.IllegalStateException: Coordinator selected invalid assignment 
protocol: null
        at 
org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:208)
        at 
org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:339)
        at 
org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:305)
        at 
org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:286))

> One or more consumers in a consumer-group stop consuming after rebalancing
> --------------------------------------------------------------------------
>
>                 Key: KAFKA-5611
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5611
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.10.2.0
>            Reporter: Panos Skianis
>            Assignee: Jason Gustafson
>            Priority: Major
>              Labels: reliability
>             Fix For: 0.11.0.1
>
>         Attachments: Server 1, Server 2, Server 3, 
> bad-server-with-more-logging-1.tar.gz, kka02
>
>
> Scenario: 
>   - 3 zookeepers, 4 Kafkas. 0.10.2.0, with 0.9.0 compatibility still on 
> (other apps need it but the one mentioned below is already on kafka 0.10.2.0  
> client).
>   - 3 servers running 1 consumer each under the same consumer groupId. 
>   - Servers seem to be consuming messages happily but then there is a timeout 
> to an external service that causes our app to restart the Kafka Consumer on 
> one of the servers (this is by design). That causes rebalancing of the group 
> and upon restart of one of the Consumers seem to "block".
>   - Server 3 is where the problems occur.
>   - Problem fixes itself either by restarting one of the 3 servers or cause 
> the group to rebalance again by using the console consumer with the 
> autocommit set to false and using the same group.
>  
> Note: 
>  - Haven't managed to recreate it at will yet.
>  - Mainly happens in production environment, often enough. Hence I do not 
> have any logs with DEBUG/TRACE statements yet.
>  - Extracts from log of each app server are attached. Also the log of the 
> kafka that seems to be dealing with the related group and generations.
>  - See COMMENT lines in the files for further info.



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