Examples of RerouteExplanation

org.elasticsearch.cluster.routing.allocation.RerouteExplanation
Class encapsulating the explanation for a single {@link AllocationCommand}taken from the Deciders

Examples of org.elasticsearch.cluster.routing.allocation.RerouteExplanation


                    // the shard is relocating to another node, cancel the recovery on the other node, and deallocate this one
                    if (!allowPrimary && shardRouting.primary()) {
                        // can't cancel a primary shard being initialized
                        if (explain) {
                            return new RerouteExplanation(this, allocation.decision(Decision.NO, "cancel_allocation_command",
                                    "can't cancel " + shardId + " on node " + discoNode + ", shard is primary and initializing its state"));
                        }
                        throw new ElasticsearchIllegalArgumentException("[cancel_allocation] can't cancel " + shardId + " on node " +
                                discoNode + ", shard is primary and initializing its state");
                    }
                    it.moveToUnassigned();
                    // now, go and find the shard that is initializing on the target node, and cancel it as well...
                    RoutingNodes.RoutingNodeIterator initializingNode = allocation.routingNodes().routingNodeIter(shardRouting.relocatingNodeId());
                    if (initializingNode != null) {
                        while (initializingNode.hasNext()) {
                            MutableShardRouting initializingShardRouting = initializingNode.next();
                            if (initializingShardRouting.shardId().equals(shardRouting.shardId()) && initializingShardRouting.state() == INITIALIZING) {
                                initializingNode.remove();
                            }
                        }
                    }
                }
            } else {
                // the shard is not relocating, its either started, or initializing, just cancel it and move on...
                if (!allowPrimary && shardRouting.primary()) {
                    // can't cancel a primary shard being initialized
                    if (explain) {
                        return new RerouteExplanation(this, allocation.decision(Decision.NO, "cancel_allocation_command",
                                "can't cancel " + shardId + " on node " + discoNode + ", shard is primary and started"));
                    }
                    throw new ElasticsearchIllegalArgumentException("[cancel_allocation] can't cancel " + shardId + " on node " +
                            discoNode + ", shard is primary and started");
                }
                it.remove();
                allocation.routingNodes().unassigned().add(new MutableShardRouting(shardRouting.index(), shardRouting.id(),
                        null, shardRouting.primary(), ShardRoutingState.UNASSIGNED, shardRouting.version() + 1));
            }
        }
        if (!found) {
            if (explain) {
                return new RerouteExplanation(this, allocation.decision(Decision.NO, "cancel_allocation_command",
                        "can't cancel " + shardId + ", failed to find it on node " + discoNode));
            }
            throw new ElasticsearchIllegalArgumentException("[cancel_allocation] can't cancel " + shardId + ", failed to find it on node " + discoNode);
        }
        return new RerouteExplanation(this, allocation.decision(Decision.YES, "cancel_allocation_command",
                "shard " + shardId + " on node " + discoNode + " can be cancelled"));
    }

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Examples of org.elasticsearch.cluster.routing.allocation.RerouteExplanation

            }
        }


        if (shardRouting == null) {
            if (explain) {
                return new RerouteExplanation(this, allocation.decision(Decision.NO, "allocate_allocation_command",
                        "failed to find " + shardId + " on the list of unassigned shards"));
            }
            throw new ElasticsearchIllegalArgumentException("[allocate] failed to find " + shardId + " on the list of unassigned shards");
        }


        if (shardRouting.primary() && !allowPrimary) {
            if (explain) {
                return new RerouteExplanation(this, allocation.decision(Decision.NO, "allocate_allocation_command",
                        "trying to allocate a primary shard " + shardId + ", which is disabled"));
            }
            throw new ElasticsearchIllegalArgumentException("[allocate] trying to allocate a primary shard " + shardId + ", which is disabled");
        }


        RoutingNode routingNode = allocation.routingNodes().node(discoNode.id());
        if (routingNode == null) {
            if (!discoNode.dataNode()) {
                if (explain) {
                    return new RerouteExplanation(this, allocation.decision(Decision.NO, "allocate_allocation_command",
                            "Allocation can only be done on data nodes, not [" + node + "]"));
                }
                throw new ElasticsearchIllegalArgumentException("Allocation can only be done on data nodes, not [" + node + "]");
            } else {
                if (explain) {
                    return new RerouteExplanation(this, allocation.decision(Decision.NO, "allocate_allocation_command",
                            "Could not find [" + node + "] among the routing nodes"));
                }
                throw new ElasticsearchIllegalStateException("Could not find [" + node + "] among the routing nodes");
            }
        }


        Decision decision = allocation.deciders().canAllocate(shardRouting, routingNode, allocation);
        if (decision.type() == Decision.Type.NO) {
            if (explain) {
                return new RerouteExplanation(this, decision);
            }
            throw new ElasticsearchIllegalArgumentException("[allocate] allocation of " + shardId + " on node " + discoNode + " is not allowed, reason: " + decision);
        }
        // go over and remove it from the unassigned
        for (Iterator<MutableShardRouting> it = allocation.routingNodes().unassigned().iterator(); it.hasNext(); ) {
            if (it.next() != shardRouting) {
                continue;
            }
            it.remove();
            allocation.routingNodes().assign(shardRouting, routingNode.nodeId());
            if (shardRouting.primary()) {
                // we need to clear the post allocation flag, since its an explicit allocation of the primary shard
                // and we want to force allocate it (and create a new index for it)
                allocation.routingNodes().addClearPostAllocationFlag(shardRouting.shardId());
            }
            break;
        }
        return new RerouteExplanation(this, decision);
    }

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Examples of org.elasticsearch.cluster.routing.allocation.RerouteExplanation

            found = true;


            // TODO we can possibly support also relocating cases, where we cancel relocation and move...
            if (!shardRouting.started()) {
                if (explain) {
                    return new RerouteExplanation(this, allocation.decision(Decision.NO, "move_allocation_command",
                            "shard " + shardId + " has not been started"));
                }
                throw new ElasticsearchIllegalArgumentException("[move_allocation] can't move " + shardId +
                        ", shard is not started (state = " + shardRouting.state() + "]");
            }


            RoutingNode toRoutingNode = allocation.routingNodes().node(toDiscoNode.id());
            decision = allocation.deciders().canAllocate(shardRouting, toRoutingNode, allocation);
            if (decision.type() == Decision.Type.NO) {
                if (explain) {
                    return new RerouteExplanation(this, decision);
                }
                throw new ElasticsearchIllegalArgumentException("[move_allocation] can't move " + shardId + ", from " + fromDiscoNode + ", to " + toDiscoNode + ", since its not allowed, reason: " + decision);
            }
            if (decision.type() == Decision.Type.THROTTLE) {
                // its being throttled, maybe have a flag to take it into account and fail? for now, just do it since the "user" wants it...
            }


            allocation.routingNodes().assign(new MutableShardRouting(shardRouting.index(), shardRouting.id(),
                    toRoutingNode.nodeId(), shardRouting.currentNodeId(), shardRouting.restoreSource(),
                    shardRouting.primary(), ShardRoutingState.INITIALIZING, shardRouting.version() + 1), toRoutingNode.nodeId());


            allocation.routingNodes().relocate(shardRouting, toRoutingNode.nodeId());
        }


        if (!found) {
            if (explain) {
                return new RerouteExplanation(this, allocation.decision(Decision.NO,
                        "move_allocation_command", "shard " + shardId + " not found"));
            }
            throw new ElasticsearchIllegalArgumentException("[move_allocation] can't move " + shardId + ", failed to find it on node " + fromDiscoNode);
        }
        return new RerouteExplanation(this, decision);
    }

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Examples of org.elasticsearch.cluster.routing.allocation.RerouteExplanation

        logger.info("--> try to move the shard from node1 to node2");
        MoveAllocationCommand cmd = new MoveAllocationCommand(new ShardId("test", 0), node_1, node_2);
        ClusterRerouteResponse resp = client().admin().cluster().prepareReroute().add(cmd).setExplain(true).execute().actionGet();
        RoutingExplanations e = resp.getExplanations();
        assertThat(e.explanations().size(), equalTo(1));
        RerouteExplanation explanation = e.explanations().get(0);
        assertThat(explanation.command().name(), equalTo(cmd.name()));
        assertThat(((MoveAllocationCommand)explanation.command()).shardId(), equalTo(cmd.shardId()));
        assertThat(((MoveAllocationCommand)explanation.command()).fromNode(), equalTo(cmd.fromNode()));
        assertThat(((MoveAllocationCommand)explanation.command()).toNode(), equalTo(cmd.toNode()));
        assertThat(explanation.decisions().type(), equalTo(Decision.Type.YES));
    }

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