krishna-st opened a new pull request, #17375:
URL: https://github.com/apache/pinot/pull/17375
Implements a drain mode for Pinot Minion instances, allowing operators to
gracefully scale down minions by preventing new task assignments while allowing
existing tasks to complete.
- Extended `PUT /instances/{instanceName}/state` to support `DRAIN` state
for minion instances
- Draining changes minion tag from `minion_untagged` → `minion_drained`,
preventing Helix from assigning new tasks
- Leverages Helix's native tag-based task assignment mechanism
(`.setInstanceGroupTag()`)
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