[HELIX-277] FULL_AUTO rebalancer should not prefer nodes that are just coming up

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.6.2-incubating
• Assignee: Kanak Biscuitwala
• Reporter: Kanak Biscuitwala
• Created: 23/Oct/13 23:16
• Updated: 12/Nov/13 22:22
• Resolved: 28/Oct/13 01:17

Description

Rebalancing in FULL_AUTO mode will relentlessly (though mostly greedily) seek a balance in both partitions and states across nodes with minimal movement. However, in this pursuit, we may end up requiring multiple transitions to get a node in the right state for a given partition.

We can fix this by refusing to prefer nodes as they come up, and then revert to the existing strategy once their current state contains a replica.