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* Licensed to Elastic Search and Shay Banon under one
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* regarding copyright ownership. Elastic Search licenses this
* file to you under the Apache License, Version 2.0 (the
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing,
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package org.elasticsearch.cluster.routing.allocation;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.routing.RoutingNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.testng.annotations.Test;
import static org.elasticsearch.cluster.ClusterState.*;
import static org.elasticsearch.cluster.metadata.IndexMetaData.*;
import static org.elasticsearch.cluster.metadata.MetaData.*;
import static org.elasticsearch.cluster.node.DiscoveryNodes.*;
import static org.elasticsearch.cluster.routing.RoutingBuilders.*;
import static org.elasticsearch.cluster.routing.ShardRoutingState.*;
import static org.elasticsearch.cluster.routing.allocation.RoutingAllocationTests.*;
import static org.elasticsearch.common.settings.ImmutableSettings.*;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;
@Test
public class ConcurrentRebalanceRoutingTests {
private final ESLogger logger = Loggers.getLogger(ConcurrentRebalanceRoutingTests.class);
@Test public void testClusterConcurrentRebalance() {
ShardsAllocation strategy = new ShardsAllocation(settingsBuilder()
.put("cluster.routing.allocation.concurrent_recoveries", 10)
.put("cluster.routing.allocation.allow_rebalance", "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", 3)
.build());
logger.info("Building initial routing table");
MetaData metaData = newMetaDataBuilder()
.put(newIndexMetaDataBuilder("test").numberOfShards(5).numberOfReplicas(1))
.build();
RoutingTable routingTable = routingTable()
.add(indexRoutingTable("test").initializeEmpty(metaData.index("test")))
.build();
ClusterState clusterState = newClusterStateBuilder().metaData(metaData).routingTable(routingTable).build();
assertThat(routingTable.index("test").shards().size(), equalTo(5));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).shards().get(1).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).shards().get(0).currentNodeId(), nullValue());
assertThat(routingTable.index("test").shard(i).shards().get(1).currentNodeId(), nullValue());
}
logger.info("start two nodes and fully start the shards");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().put(newNode("node1")).put(newNode("node2"))).build();
RoutingTable prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(i).replicaShards().get(0).state(), equalTo(UNASSIGNED));
}
logger.info("start all the primary shards, replicas will start initializing");
RoutingNodes routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).replicaShards().get(0).state(), equalTo(INITIALIZING));
}
logger.info("now, start 8 more nodes, and check that no rebalancing/relocation have happened");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().putAll(clusterState.nodes())
.put(newNode("node3")).put(newNode("node4")).put(newNode("node5")).put(newNode("node6")).put(newNode("node7")).put(newNode("node8")).put(newNode("node9")).put(newNode("node10")))
.build();
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).replicaShards().get(0).state(), equalTo(INITIALIZING));
}
logger.info("start the replica shards, rebalancing should start, but, only 3 should be rebalancing");
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
// we only allow one relocation at a time
assertThat(routingTable.shardsWithState(STARTED).size(), equalTo(7));
assertThat(routingTable.shardsWithState(RELOCATING).size(), equalTo(3));
logger.info("finalize this session relocation, 3 more should relocate now");
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
// we only allow one relocation at a time
assertThat(routingTable.shardsWithState(STARTED).size(), equalTo(7));
assertThat(routingTable.shardsWithState(RELOCATING).size(), equalTo(3));
logger.info("finalize this session relocation, 2 more should relocate now");
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
// we only allow one relocation at a time
assertThat(routingTable.shardsWithState(STARTED).size(), equalTo(8));
assertThat(routingTable.shardsWithState(RELOCATING).size(), equalTo(2));
logger.info("finalize this session relocation, no more relocation");
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
// we only allow one relocation at a time
assertThat(routingTable.shardsWithState(STARTED).size(), equalTo(10));
assertThat(routingTable.shardsWithState(RELOCATING).size(), equalTo(0));
}
}