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  1. Kafka
  2. KAFKA-567

Replication Data Loss in Mirror Maker Bouncing testcase

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: 0.8.0
    • Fix Version/s: 0.8.0
    • Component/s: core
    • Labels:

      Description

      • Test Description:
        1. Start a 3-broker cluster as source
        2. Start a 3-broker cluster as target
        3. Start 1 instance of Mirror Maker to replicate data from source to target
        4. While producer is sending data into source cluster, stop Mirror Maker with "kill -15". Start Mirror Maker again after 1 second.
        5. Start a consumer to consume data from target cluster.
        6. Compare the MessageID in the data between producer log and consumer log.
      • To reproduce this issue, please do the followings:

      1. Download the latest 0.8 branch
      2. Apply the patch attached to this JIRA
      3. Build kafka by running "./sbt update package"
      4. Execute the test in directory "system_test" : "python -B system_test_runner.py"

      • The test result may look like the following:

      _test_case_name : testcase_5002
      _test_class_name : MirrorMakerTest
      arg : bounce_leader : false
      arg : bounce_mirror_maker : true
      arg : message_producing_free_time_sec : 15
      arg : num_iteration : 1
      arg : num_messages_to_produce_per_producer_call : 50
      arg : num_partition : 1
      arg : replica_factor : 3
      arg : sleep_seconds_between_producer_calls : 1
      validation_status :
      Log segment checksum matching across all replicas : FAILED
      Unique messages from consumer on [test_1] : 355
      Unique messages from producer on [test_1] : 400
      Validate for data matched on topic [test_1] : FAILED

      • Attached a tar file for the system test output log, the brokers' log4j files and data log segment files.
      • There are no unusual Exception / Error found in the logs. However, there are consistently data loss in this Mirror Maker bouncing test case. Not sure if this is related to KAFKA-552.

        Attachments

        1. kafka-567.patch
          0.6 kB
          Jun Rao
        2. KAFKA-567-mirrormakershutdown-v1.patch
          2 kB
          Joel Koshy
        3. kafka-mirror-maker-bouncing-data-loss.patch
          18 kB
          John Fung
        4. mirror_maker_12.log
          219 kB
          John Fung
        5. system_test_1349971807_testcase_5002.tar
          2.01 MB
          John Fung

          Activity

            People

            • Assignee:
              junrao Jun Rao
              Reporter:
              jfung John Fung
            • Votes:
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              Dates

              • Created:
                Updated:
                Resolved: