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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.cluster.routing.allocation;
import org.apache.lucene.util.TestUtil;
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.routing.IndexShardRoutingTable;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.common.settings.Settings;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
/**
* see issue #9023
*/
public class BalanceUnbalancedClusterTests extends CatAllocationTestCase {
@Override
protected Path getCatPath() throws IOException {
Path tmp = createTempDir();
try (InputStream stream = Files.newInputStream(getDataPath("/org/elasticsearch/cluster/routing/issue_9023.zip"))) {
TestUtil.unzip(stream, tmp);
}
return tmp.resolve("issue_9023");
}
@Override
protected ClusterState allocateNew(ClusterState state) {
String index = "tweets-2014-12-29:00";
AllocationService strategy = createAllocationService(Settings.builder()
.build());
MetaData metaData = MetaData.builder(state.metaData())
.put(IndexMetaData.builder(index).settings(settings(Version.CURRENT)).numberOfShards(5).numberOfReplicas(1))
.build();
RoutingTable initialRoutingTable = RoutingTable.builder(state.routingTable())
.addAsNew(metaData.index(index))
.build();
ClusterState clusterState = ClusterState.builder(state).metaData(metaData).routingTable(initialRoutingTable).build();
RoutingAllocation.Result routingResult = strategy.reroute(clusterState, "reroute");
clusterState = ClusterState.builder(clusterState).routingResult(routingResult).build();
while (true) {
if (clusterState.routingTable().shardsWithState(INITIALIZING).isEmpty()) {
break;
}
routingResult = strategy.applyStartedShards(clusterState, clusterState.routingTable().shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingResult(routingResult).build();
}
Map<String, Integer> counts = new HashMap<>();
for (IndexShardRoutingTable table : clusterState.routingTable().index(index)) {
for (ShardRouting r : table) {
String s = r.currentNodeId();
Integer count = counts.get(s);
if (count == null) {
count = 0;
}
count++;
counts.put(s, count);
}
}
for (Map.Entry<String, Integer> count : counts.entrySet()) {
// we have 10 shards and 4 nodes so 2 nodes have 3 shards and 2 nodes have 2 shards
assertTrue("Node: " + count.getKey() + " has shard mismatch: " + count.getValue(), count.getValue() >= 2);
assertTrue("Node: " + count.getKey() + " has shard mismatch: " + count.getValue(), count.getValue() <= 3);
}
return clusterState;
}
}
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