Class NodeVersionAllocationDecider


public class NodeVersionAllocationDecider extends AllocationDecider
An allocation decider that prevents relocation or allocation from nodes that might not be version compatible. If we relocate from a node that runs a newer version than the node we relocate to this might cause IndexFormatTooNewException on the lowest level since it might have already written segments that use a new postings format or codec that is not available on the target node.