[jira] [Created] (KAFKA-5366) Add cases for concurrent transactional reads and writes in system tests

["Apurva Mehta (JIRA)" <ji...@apache.org>]

Apurva Mehta created KAFKA-5366:
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             Summary: Add cases for concurrent transactional reads and writes in system tests
                 Key: KAFKA-5366
                 URL: https://issues.apache.org/jira/browse/KAFKA-5366
             Project: Kafka
          Issue Type: Test
    Affects Versions: 0.11.0.0
            Reporter: Apurva Mehta
            Assignee: Apurva Mehta
             Fix For: 0.11.1.0


Currently the transactions system test does transactional copy while bouncing brokers and clients, and then does a verifying read on the output topic to ensure that it exactly matches the input. 

We should also have a transactional consumer reading the tail of the output topic as the writes are happening, and then assert that the values _it_ reads also exactly match the values in the source topics. 

This test really exercises the abort index, and we don't have any of them in the system or integration tests right now. 



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