fac7efba9a
This commit ensures that ILM's Shrink action will take node versions into account when choosing which node to allocate to when shrinking an index. Prior to this change, ILM could pick a node with a lower version than some shards are already allocated to, which causes the new allocation to fail as shards can't be relocated onto a node with a lower version than they are already on. As part of this, when making the decision about which node to allocate to prior to Shrink, all shards in the index are considered, rather than choosing a random shard to consider. Further, the unit tests for the logic that chooses a node to allocate shards to pre-shrink has been improved to validate the behavior in more realistic and varied initial conditions. |
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