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  1. Tajo
  2. TAJO-1143

TajoMaster, TajoWorker, and TajoClient should have diagnosis phase at startup

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      I propose that all cluster components (TajoMaster, TajoWorker, and TajoClient) in a Tajo cluster should have a diagnosis phase to eliminate or detect invalid situations prior to runtime query errors.

      For example, your query can cause some runtime exception due to wrong config after a query takes 2 hours. This situation is definitely not acceptable in production.

      I think that the diagnosis phase should check all configs, connectivities among cluster components, and status of workers.

      In detail, we need a diagnosis executor, extensible diagnosis rule interface, and its rules. Also, one of diagnosis rules would be TAJO-1114.

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            • Assignee:
              ykrips Jihun Kang
              Reporter:
              hyunsik Hyunsik Choi
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