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https://issues.apache.org/jira/browse/KAFKA-2900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Ben Stopford updated KAFKA-2900:
--------------------------------
    Description: 
More consumer strangeness from the rolling upgrade test. 

Clients dumps out many instances of:

{[2015-11-26 16:03:26,369] WARN Unknown error fetching data for topic-partition 
test_topic-0 (org.apache.kafka.clients.consumer.internals.Fetcher)}

Corresponding server error is:

{[2015-11-26 16:03:26,483] ERROR [Replica Manager on Broker 1]: Error 
processing fetch operation on partition [test_topic,2] offset 13529 
(kafka.server.ReplicaManager)}

It would appear we don't log the cause of this error (i.e. the exception) so 
it's a bit tricky working out what happened. I've submitted a patch to improve 
this (https://issues.apache.org/jira/browse/KAFKA-2899).

The test fails as the consumer stops consuming from this point


  was:
More consumer strangeness from the rolling upgrade test. 

Clients dumps out many instances of:

{[2015-11-26 16:03:26,369] WARN Unknown error fetching data for topic-partition 
test_topic-0 (org.apache.kafka.clients.consumer.internals.Fetcher)}

Corresponding server error is:

{[2015-11-26 16:03:26,483] ERROR [Replica Manager on Broker 1]: Error 
processing fetch operation on partition [test_topic,2] offset 13529 
(kafka.server.ReplicaManager)}

It would appear we don't log the cause of this error (i.e. the exception) so 
it's a bit tricky working out what happened. I've submitted a patch to improve 
this (https://issues.apache.org/jira/browse/KAFKA-2899).

The test fails as the consumer stops consuming from this poing



> Error Consuming From Kafka
> --------------------------
>
>                 Key: KAFKA-2900
>                 URL: https://issues.apache.org/jira/browse/KAFKA-2900
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: Ben Stopford
>            Assignee: Ben Stopford
>
> More consumer strangeness from the rolling upgrade test. 
> Clients dumps out many instances of:
> {[2015-11-26 16:03:26,369] WARN Unknown error fetching data for 
> topic-partition test_topic-0 
> (org.apache.kafka.clients.consumer.internals.Fetcher)}
> Corresponding server error is:
> {[2015-11-26 16:03:26,483] ERROR [Replica Manager on Broker 1]: Error 
> processing fetch operation on partition [test_topic,2] offset 13529 
> (kafka.server.ReplicaManager)}
> It would appear we don't log the cause of this error (i.e. the exception) so 
> it's a bit tricky working out what happened. I've submitted a patch to 
> improve this (https://issues.apache.org/jira/browse/KAFKA-2899).
> The test fails as the consumer stops consuming from this point



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