org.elasticsearch.cluster.routing.allocation.decider

Class NodeVersionAllocationDecider

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider

org.elasticsearch.cluster.routing.allocation.decider.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.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	NAME

Fields inherited from class org.elasticsearch.common.component.AbstractComponent

deprecationLogger, logger, settings

Constructor Summary

Constructors

Constructor and Description
NodeVersionAllocationDecider(Settings settings)

Method Summary

Modifier and Type	Method and Description
Decision	canAllocate(ShardRouting shardRouting, RoutingNode node, RoutingAllocation allocation) Returns a Decision whether the given shard routing can be allocated on the given node.

Methods inherited from class org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider

canAllocate, canAllocate, canAllocate, canForceAllocatePrimary, canRebalance, canRebalance, canRemain

Methods inherited from class org.elasticsearch.common.component.AbstractComponent

logDeprecatedSetting, logRemovedSetting, nodeName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NAME

public static final java.lang.String NAME

See Also:

Constant Field Values

Constructor Detail

NodeVersionAllocationDecider

public NodeVersionAllocationDecider(Settings settings)

Method Detail

canAllocate

public Decision canAllocate(ShardRouting shardRouting,
                            RoutingNode node,
                            RoutingAllocation allocation)

Description copied from class: AllocationDecider

Returns a Decision whether the given shard routing can be allocated on the given node. The default is Decision.ALWAYS.

Overrides:

canAllocate in class AllocationDecider