John Fung created KAFKA-621:
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             Summary: System Test 9051 : ConsoleConsumer doesn't receives any 
data for 20 topics but works for 10
                 Key: KAFKA-621
                 URL: https://issues.apache.org/jira/browse/KAFKA-621
             Project: Kafka
          Issue Type: Bug
            Reporter: John Fung


* This issue may be related to KAFKA-618

* To reproduce the issue:
    1. Download the latest 0.8 branch and apply the attached patch
    2. In <kafka_home>, execute "./sbt update package"
    3. In <kafka_home>/system_test, execute "python -B system_test_runner.py" 
and it will execute testcase_9051

* The validation output would be as follows:
validation_status  : 
     Unique messages from consumer on [t001]  :  0
     Unique messages from consumer on [t002]  :  0
     . . .
     Unique messages from consumer on [t019]  :  0
     Unique messages from consumer on [t020]  :  0
     Unique messages from producer on [t001]  :  1000
     Unique messages from producer on [t002]  :  1000
     . . .
     Unique messages from producer on [t018]  :  1000
     Unique messages from producer on [t019]  :  1000
     Unique messages from producer on [t020]  :  1000
     Validate for data matched on topic [t001]  :  FAILED
     Validate for data matched on topic [t002]  :  FAILED
     . . .
     Validate for data matched on topic [t019]  :  FAILED
     Validate for data matched on topic [t020]  :  FAILED
     Validate for merged log segment checksum in cluster [source]  :  PASSED

* However, it will work fine if there are only 10 topics
     In 
system_test/replication_testsuite/testcase_9051/testcase_9051_properties.json, 
update the following line to 10 topics:

      "topic": 
"t001,t002,t003,t004,t005,t006,t007,t008,t009,t010,t011,t012,t013,t014,t015,t016,t017,t018,t019,t020",

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