Examples with RerouteExplanation org.elasticsearch.cluster.routing.allocation.RerouteExplanation used on opensource projects

Example 11 with RerouteExplanation

use of org.elasticsearch.cluster.routing.allocation.RerouteExplanation in project crate by crate.

the class AllocateEmptyPrimaryAllocationCommand method execute.

@Override
public RerouteExplanation execute(RoutingAllocation allocation, boolean explain) {
    final DiscoveryNode discoNode;
    try {
        discoNode = allocation.nodes().resolveNode(node);
    } catch (IllegalArgumentException e) {
        return explainOrThrowRejectedCommand(explain, allocation, e);
    }
    final RoutingNodes routingNodes = allocation.routingNodes();
    RoutingNode routingNode = routingNodes.node(discoNode.getId());
    if (routingNode == null) {
        return explainOrThrowMissingRoutingNode(allocation, explain, discoNode);
    }
    try {
        allocation.routingTable().shardRoutingTable(index, shardId).primaryShard();
    } catch (IndexNotFoundException | ShardNotFoundException e) {
        return explainOrThrowRejectedCommand(explain, allocation, e);
    }
    ShardRouting shardRouting = null;
    for (ShardRouting shard : allocation.routingNodes().unassigned()) {
        if (shard.getIndexName().equals(index) && shard.getId() == shardId && shard.primary()) {
            shardRouting = shard;
            break;
        }
    }
    if (shardRouting == null) {
        return explainOrThrowRejectedCommand(explain, allocation, "primary [" + index + "][" + shardId + "] is already assigned");
    }
    if (shardRouting.recoverySource().getType() != RecoverySource.Type.EMPTY_STORE && acceptDataLoss == false) {
        String dataLossWarning = "allocating an empty primary for [" + index + "][" + shardId + "] can result in data loss. Please confirm by setting the accept_data_loss parameter to true";
        return explainOrThrowRejectedCommand(explain, allocation, dataLossWarning);
    }
    UnassignedInfo unassignedInfoToUpdate = null;
    if (shardRouting.unassignedInfo().getReason() != UnassignedInfo.Reason.FORCED_EMPTY_PRIMARY) {
        String unassignedInfoMessage = "force empty allocation from previous reason " + shardRouting.unassignedInfo().getReason() + ", " + shardRouting.unassignedInfo().getMessage();
        unassignedInfoToUpdate = new UnassignedInfo(UnassignedInfo.Reason.FORCED_EMPTY_PRIMARY, unassignedInfoMessage, shardRouting.unassignedInfo().getFailure(), 0, System.nanoTime(), System.currentTimeMillis(), false, shardRouting.unassignedInfo().getLastAllocationStatus(), Collections.emptySet());
    }
    initializeUnassignedShard(allocation, routingNodes, routingNode, shardRouting, unassignedInfoToUpdate, EmptyStoreRecoverySource.INSTANCE);
    return new RerouteExplanation(this, allocation.decision(Decision.YES, name() + " (allocation command)", "ignore deciders"));
}