Eno Thereska created KAFKA-3401:
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Summary: Message format change on the fly breaks 0.9 consumer
Key: KAFKA-3401
URL: https://issues.apache.org/jira/browse/KAFKA-3401
Project: Kafka
Issue Type: Bug
Affects Versions: 0.10.0.0
Reporter: Eno Thereska
Assignee: Jiangjie Qin
Priority: Blocker
Fix For: 0.10.0.0
The new system test as part of KAFKA-3202 reveals a problem when the message
format is changed on the fly. When the cluster is using 0.10.x brokers and
producers and consumers use version 0.9.0.1 an error happens when the message
format is changed on the fly to version 0.9:
{code}
Exception: {'ConsoleConsumer-worker-1': Exception('Unexpected message format
(expected an integer). Message: null',)}
{code}
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