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  1. Core Server
  2. SERVER-60752

API for detecting conflicts among PrimaryOnlyService instances

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Details

    • Task
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 5.2.0
    • None
    • None
    • Fully Compatible
    • Server Serverless 2021-10-18, Server Serverless 2021-10-25, Server Serverless 2021-11-01
    • 15

    Description

      Many POS subclasses have restrictions on instances, e.g. there can't be two TenantMigrationDonorService::Instance objects with the same tenantId. It's hard to enforce such a rule without races: you'd need to hold the PrimaryOnlyService mutex while checking the rule, but the mutex is private. Different services use different techniques, e.g. relying on a unique index, or relying on some other registry to enforce the rule.

      Let's make a general mechanism for PrimaryOnlyService conflict detection. Use the new mech in place of the messy way TenantMigrationDonorService enforces its unique tenantId rule.

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          causes

          Task - A task that needs to be done. SERVER-61015 Remove dead checks for ConflictingOperationInProgress from TenantMigrationDonorService

          • Major - P3 - Major loss of function.
          • Closed
          is depended on by

          Task - A task that needs to be done. SERVER-59786 Prevent concurrent merges

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-61785 API for detecting conflicts among TenantMigrationDonor POS instances is racy.

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              jesse@mongodb.com A. Jesse Jiryu Davis
              jesse@mongodb.com A. Jesse Jiryu Davis
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                Created:
                Updated:
                Resolved: