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https://issues.apache.org/jira/browse/KAFKA-791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Fung updated KAFKA-791:
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    Attachment: kafka-791-v2.patch
    
> Fix validation bugs in System Test
> ----------------------------------
>
>                 Key: KAFKA-791
>                 URL: https://issues.apache.org/jira/browse/KAFKA-791
>             Project: Kafka
>          Issue Type: Task
>            Reporter: John Fung
>            Assignee: John Fung
>              Labels: replication-testing
>         Attachments: kafka-791-v1.patch, kafka-791-v2.patch
>
>
> The following issues are found in data / log checksum match in System Test:
> 1. kafka_system_test_utils.validate_simple_consumer_data_matched
> It reports PASSED even some log segments don't match
> 2. kafka_system_test_utils.validate_data_matched (this is fixed and patched 
> in local Hudson for some time)
> It reports PASSED in the Ack=1 cases even data loss is greater than the 
> tolerance (1%).
> 3. kafka_system_test_utils.validate_simple_consumer_data_matched
> It gets a unique set of MessageID to validate. It should leave all MessageID 
> as is (no dedup needed) and the test case should fail if sorted MessageID 
> don't match across the replicas.
> 4. There is a data loss tolerance of 1% in the test cases of Ack=1. Currently 
> 1% is too strict and seeing some random failures due to 2 ~ 3% of data loss. 
> It will be increased to 5% such that the System Test will get a more 
> consistent passing rate in those test cases. The following will be updated to 
> 5% tolerance in kafka_system_test_utils:
> validate_data_matched
> validate_simple_consumer_data_matched
> validate_data_matched_in_multi_topics_from_single_consumer_producer

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