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  1. SAFe Program
  2. SP-3133

Explore and implement options for handling failure scenarios

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    • Obs Mgt & Controls
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      One or more approaches for handling failure scenarios are identified. 

      Applicability of the approach(s) for specific scenarios is understood.

       

      Show
      One or more approaches for handling failure scenarios are identified.  Applicability of the approach(s) for specific scenarios is understood.  
    • Hide

      The analysis of approaches for handling failure scenarios in TMC is documented. 

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      The analysis of approaches for handling failure scenarios in TMC is documented. 
    • 3
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    • Team_HIMALAYA, Team_SAHYADRI
    • Sprint 2
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      • The implementation of failure handling (error propagation) and command timeout for the AssignResources command is merged into the tmc integration repo
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      Proposal for failure handling in TMC https://confluence.skatelescope.org/display/SWSI/Failure+Handling+in+TMC Created POC based on BC ver 13 (use of longrunningcommandResult attribute) to report and propagate the exceptions in TMC Created a POC on implementing a timeout while processing a command. The POC is extended for AssignResources commands in all TMC nodes, thus providing end-to-end command timeout detection for one command. Relevant POC work MRs are as below: POC on Sdpleafnodes: https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-sdpleafnodes/-/merge_requests/336 POC on cspleafnodes: https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-cspleafnodes/-/merge_requests/56 POC on SubarrayNode: https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-subarraynode/-/merge_requests/87 POC on CentralNode: https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-centralnode/-/merge_requests/89 System Demo provided for the failure propagation in TMC and also the command timeout The implementation of failure handling (error propagation) and command timeout for the AssignResources command is merged into the tmc integration repo
    • 19.1
    • Stories Completed, Solution Intent Updated, Satisfies Acceptance Criteria, Accepted by FO

    Description

      The spike will explore options for handling failure scenarios in TMC that result into a subarray to go into an inconsistent state (e.g. TMC, SDP and CSP devices/systems report inconsistent observation states). This may occur due to exceptions detected and raised in segment systems, that are not recognized or handled by the TMC.
      The spike will look as aspects such as:
      1. Exception handling and propagation
      2. Reporting failures to the user
      3. Recovering from failures
      The spike shall come up with one or more approaches, which can be prototyped separately.

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          Is delivered by

          Sub-system Version - A version of a sub-system, used in the Release Management and Configuration Management process REL-679 SKA TMC LOW v0.6.0

          • Discarded

          Component Version - Component/module/library releases REL-653 ska-tmc-cspleafnode v0.4.0

          • Released

          Sub-system Version - A version of a sub-system, used in the Release Management and Configuration Management process REL-680 SKA TMC MID v0.9.0

          • Released
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                Adam.Avison Avison, Adam
                m.patil Patil, Mangesh
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                Feature Progress

                  Story Point Burn-up: (100.00%)

                  Feature Estimate: 3.0

                  IssuesStory Points
                  To Do00.0
                  In Progress   00.0
                  Complete1655.0
                  Total1655.0

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