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  1. Samza
  2. SAMZA-2161

Move ChangelogPartitionManager and CoordinatorStream ConfigReader to MetadataStore

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.2
    • Component/s: None
    • Labels:
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      Description

      Currently the metadata of a samza job is stored into a kafka topic named coordinator stream.

      In samza-yarn ApplicationMaster, the same coordinator stream is read twice as a part of the startup sequence. This duplicate read unnecessarily prolongs the startup time of the application master and makes the container allocation take longer than usual. This inadvertently incurs a substantial increase in input stream processing delay depending upon the size of the coordinator stream. 

      To mitigate this problem, the two util classes in samza viz `ChangelogPartitionManager`, `Config` should be moved to use the MetadataStore abstraction. This ticket tracks the work involved in the migration. 

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              • Assignee:
                spvenkat Shanthoosh Venkataraman
                Reporter:
                spvenkat Shanthoosh Venkataraman
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