org.elasticsearch.cluster.routing.allocation.decider.RebalanceOnlyWhenActiveAllocationDecider Maven / Gradle / Ivy
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package org.elasticsearch.cluster.routing.allocation.decider;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
/**
* Only allow rebalancing when all shards are active within the shard replication group.
*/
public class RebalanceOnlyWhenActiveAllocationDecider extends AllocationDecider {
@Inject
public RebalanceOnlyWhenActiveAllocationDecider(Settings settings) {
super(settings);
}
@Override
public Decision canRebalance(ShardRouting shardRouting, RoutingAllocation allocation) {
// its ok to check for active here, since in relocation, a shard is split into two in routing
// nodes, once relocating, and one initializing
if (!allocation.routingNodes().allReplicasActive(shardRouting)) {
return allocation.decision(Decision.NO, "not all replicas are active in cluster");
}
return allocation.decision(Decision.YES, "all replicas are active in cluster");
}
}