@Test
public void testRebalanceOnlyAfterAllShardsAreActive() {
ShardsAllocation strategy =
new ShardsAllocation(
settingsBuilder().put("cluster.routing.allocation.concurrent_recoveries", 10).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");
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(5));
assertThat(routingTable.shardsWithState(RELOCATING).size(), equalTo(5));
logger.info("complete relocation, other half of relocation should happen");
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable =
strategy
.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING))
.routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
// we now only relocate 3, since 2 remain where they are!
assertThat(routingTable.shardsWithState(STARTED).size(), equalTo(7));
assertThat(routingTable.shardsWithState(RELOCATING).size(), equalTo(3));
logger.info("complete relocation, thats it!");
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable =
strategy
.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING))
.routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
assertThat(routingTable.shardsWithState(STARTED).size(), equalTo(10));
// make sure we have an even relocation
for (RoutingNode routingNode : routingNodes) {
assertThat(routingNode.shards().size(), equalTo(1));
}
}
@Test
public void testSimpleJsonFromAndTo() throws IOException {
MetaData metaData =
newMetaDataBuilder()
.maxNumberOfShardsPerNode(2)
.put(newIndexMetaDataBuilder("test1").numberOfShards(1).numberOfReplicas(2))
.put(
newIndexMetaDataBuilder("test2")
.settings(settingsBuilder().put("setting1", "value1").put("setting2", "value2"))
.numberOfShards(2)
.numberOfReplicas(3))
.put(
newIndexMetaDataBuilder("test3")
.numberOfShards(1)
.numberOfReplicas(2)
.putMapping("mapping1", MAPPING_SOURCE1))
.put(
newIndexMetaDataBuilder("test4")
.settings(settingsBuilder().put("setting1", "value1").put("setting2", "value2"))
.numberOfShards(1)
.numberOfReplicas(2)
.putMapping("mapping1", MAPPING_SOURCE1)
.putMapping("mapping2", MAPPING_SOURCE2))
.build();
String metaDataSource = MetaData.Builder.toJson(metaData);
System.out.println("ToJson: " + metaDataSource);
MetaData parsedMetaData =
MetaData.Builder.fromJson(
Jackson.defaultJsonFactory().createJsonParser(metaDataSource), null);
assertThat(parsedMetaData.maxNumberOfShardsPerNode(), equalTo(2));
IndexMetaData indexMetaData = metaData.index("test1");
assertThat(indexMetaData.numberOfShards(), equalTo(1));
assertThat(indexMetaData.numberOfReplicas(), equalTo(2));
assertThat(indexMetaData.settings().getAsMap().size(), equalTo(2));
assertThat(indexMetaData.mappings().size(), equalTo(0));
indexMetaData = metaData.index("test2");
assertThat(indexMetaData.numberOfShards(), equalTo(2));
assertThat(indexMetaData.numberOfReplicas(), equalTo(3));
assertThat(indexMetaData.settings().getAsMap().size(), equalTo(4));
assertThat(indexMetaData.settings().get("setting1"), equalTo("value1"));
assertThat(indexMetaData.settings().get("setting2"), equalTo("value2"));
assertThat(indexMetaData.mappings().size(), equalTo(0));
indexMetaData = metaData.index("test3");
assertThat(indexMetaData.numberOfShards(), equalTo(1));
assertThat(indexMetaData.numberOfReplicas(), equalTo(2));
assertThat(indexMetaData.settings().getAsMap().size(), equalTo(2));
assertThat(indexMetaData.mappings().size(), equalTo(1));
assertThat(indexMetaData.mappings().get("mapping1"), equalTo(MAPPING_SOURCE1));
indexMetaData = metaData.index("test4");
assertThat(indexMetaData.numberOfShards(), equalTo(1));
assertThat(indexMetaData.numberOfReplicas(), equalTo(2));
assertThat(indexMetaData.settings().getAsMap().size(), equalTo(4));
assertThat(indexMetaData.settings().get("setting1"), equalTo("value1"));
assertThat(indexMetaData.settings().get("setting2"), equalTo("value2"));
assertThat(indexMetaData.mappings().size(), equalTo(2));
assertThat(indexMetaData.mappings().get("mapping1"), equalTo(MAPPING_SOURCE1));
assertThat(indexMetaData.mappings().get("mapping2"), equalTo(MAPPING_SOURCE2));
}