apache/helix

AutoRebalanceStrategy generate empty IdealState

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MarkGaox commented

Describe the bug

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AutoRebalanceStrategy generate empty IdealState and preference list after nodes are disabled.

To Reproduce

Steps to reproduce the behavior.

  1. Create a cluster of two nodes
  2. Create resource with ANY_LINVEINSTANCE replica count and use the LeaderStandby Model
  3. EV: N1 -> Leader, N2 -> Standby, IS: N1 -> Leader, N2 -> Standby
  4. Disable node 1.
  5. Since the Strategy generates a empty IS, the original IS is not changed.

Expected behavior

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After node 1 is disabled, we should see the leader replica switched to the node 2.

Additional context

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