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* http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.cluster.routing.allocation;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.RoutingNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.cluster.ESAllocationTestCase;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
import static org.elasticsearch.cluster.routing.ShardRoutingState.STARTED;
import static org.elasticsearch.cluster.routing.ShardRoutingState.UNASSIGNED;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.not;
import static org.hamcrest.Matchers.nullValue;
public class ReplicaAllocatedAfterPrimaryTests extends ESAllocationTestCase {
private final Logger logger = Loggers.getLogger(ReplicaAllocatedAfterPrimaryTests.class);
public void testBackupIsAllocatedAfterPrimary() {
AllocationService strategy = createAllocationService(Settings.builder().put("cluster.routing.allocation.node_concurrent_recoveries", 10).build());
logger.info("Building initial routing table");
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(1))
.build();
RoutingTable routingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData).routingTable(routingTable).build();
assertThat(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(2));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(0).shards().get(1).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(0).shards().get(0).currentNodeId(), nullValue());
assertThat(routingTable.index("test").shard(0).shards().get(1).currentNodeId(), nullValue());
logger.info("Adding one node and performing rerouting");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(newNode("node1")).add(newNode("node2"))).build();
RoutingTable prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
final String nodeHoldingPrimary = routingTable.index("test").shard(0).primaryShard().currentNodeId();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(2));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(0).primaryShard().state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(0).primaryShard().currentNodeId(), equalTo(nodeHoldingPrimary));
assertThat(routingTable.index("test").shard(0).replicaShards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).replicaShards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(0).replicaShards().get(0).currentNodeId(), nullValue());
logger.info("Start all the primary shards");
RoutingNodes routingNodes = clusterState.getRoutingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node(nodeHoldingPrimary).shardsWithState(INITIALIZING)).routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
final String nodeHoldingReplica = routingTable.index("test").shard(0).replicaShards().get(0).currentNodeId();
assertThat(nodeHoldingPrimary, not(equalTo(nodeHoldingReplica)));
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(2));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(0).primaryShard().state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(0).primaryShard().currentNodeId(), equalTo(nodeHoldingPrimary));
assertThat(routingTable.index("test").shard(0).replicaShards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).replicaShards().get(0).state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(0).replicaShards().get(0).currentNodeId(), equalTo(nodeHoldingReplica));
}
}