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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.search.preference;
import org.elasticsearch.action.admin.cluster.node.stats.NodeStats;
import org.elasticsearch.action.admin.cluster.node.stats.NodesStatsResponse;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.cluster.health.ClusterHealthStatus;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.test.ESIntegTestCase;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import static org.elasticsearch.cluster.metadata.IndexMetaData.SETTING_NUMBER_OF_REPLICAS;
import static org.elasticsearch.index.query.QueryBuilders.matchAllQuery;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.hasToString;
import static org.hamcrest.Matchers.not;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.greaterThan;
import static org.hamcrest.Matchers.greaterThanOrEqualTo;
@ESIntegTestCase.ClusterScope(minNumDataNodes = 2)
public class SearchPreferenceIT extends ESIntegTestCase {
// see #2896
public void testStopOneNodePreferenceWithRedState() throws InterruptedException, IOException {
assertAcked(prepareCreate("test").setSettings(Settings.builder().put("index.number_of_shards", cluster().numDataNodes()+2).put("index.number_of_replicas", 0)));
ensureGreen();
for (int i = 0; i < 10; i++) {
client().prepareIndex("test", "type1", ""+i).setSource("field1", "value1").execute().actionGet();
}
refresh();
internalCluster().stopRandomDataNode();
client().admin().cluster().prepareHealth().setWaitForStatus(ClusterHealthStatus.RED).execute().actionGet();
String[] preferences = new String[] {"_primary", "_local", "_primary_first", "_prefer_nodes:somenode", "_prefer_nodes:server2", "_prefer_nodes:somenode,server2"};
for (String pref : preferences) {
logger.info("--> Testing out preference={}", pref);
SearchResponse searchResponse = client().prepareSearch().setSize(0).setPreference(pref).execute().actionGet();
assertThat(RestStatus.OK, equalTo(searchResponse.status()));
assertThat(pref, searchResponse.getFailedShards(), greaterThanOrEqualTo(0));
searchResponse = client().prepareSearch().setPreference(pref).execute().actionGet();
assertThat(RestStatus.OK, equalTo(searchResponse.status()));
assertThat(pref, searchResponse.getFailedShards(), greaterThanOrEqualTo(0));
}
//_only_local is a stricter preference, we need to send the request to a data node
SearchResponse searchResponse = dataNodeClient().prepareSearch().setSize(0).setPreference("_only_local").execute().actionGet();
assertThat(RestStatus.OK, equalTo(searchResponse.status()));
assertThat("_only_local", searchResponse.getFailedShards(), greaterThanOrEqualTo(0));
searchResponse = dataNodeClient().prepareSearch().setPreference("_only_local").execute().actionGet();
assertThat(RestStatus.OK, equalTo(searchResponse.status()));
assertThat("_only_local", searchResponse.getFailedShards(), greaterThanOrEqualTo(0));
}
public void testNoPreferenceRandom() throws Exception {
assertAcked(prepareCreate("test").setSettings(
//this test needs at least a replica to make sure two consecutive searches go to two different copies of the same data
Settings.builder().put(indexSettings()).put(SETTING_NUMBER_OF_REPLICAS, between(1, maximumNumberOfReplicas()))
));
ensureGreen();
client().prepareIndex("test", "type1").setSource("field1", "value1").execute().actionGet();
refresh();
final Client client = internalCluster().smartClient();
SearchResponse searchResponse = client.prepareSearch("test").setQuery(matchAllQuery()).execute().actionGet();
String firstNodeId = searchResponse.getHits().getAt(0).shard().getNodeId();
searchResponse = client.prepareSearch("test").setQuery(matchAllQuery()).execute().actionGet();
String secondNodeId = searchResponse.getHits().getAt(0).shard().getNodeId();
assertThat(firstNodeId, not(equalTo(secondNodeId)));
}
public void testSimplePreference() throws Exception {
client().admin().indices().prepareCreate("test").setSettings("{\"number_of_replicas\": 1}").get();
ensureGreen();
client().prepareIndex("test", "type1").setSource("field1", "value1").execute().actionGet();
refresh();
SearchResponse searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_local").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_local").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_primary").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_primary").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_replica").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_replica").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_replica_first").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_replica_first").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("1234").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
searchResponse = client().prepareSearch().setQuery(matchAllQuery()).setPreference("1234").execute().actionGet();
assertThat(searchResponse.getHits().totalHits(), equalTo(1L));
}
public void testReplicaPreference() throws Exception {
client().admin().indices().prepareCreate("test").setSettings("{\"number_of_replicas\": 0}").get();
ensureGreen();
client().prepareIndex("test", "type1").setSource("field1", "value1").execute().actionGet();
refresh();
try {
client().prepareSearch().setQuery(matchAllQuery()).setPreference("_replica").execute().actionGet();
fail("should have failed because there are no replicas");
} catch (Exception e) {
// pass
}
SearchResponse resp = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_replica_first").execute().actionGet();
assertThat(resp.getHits().totalHits(), equalTo(1L));
client().admin().indices().prepareUpdateSettings("test").setSettings("{\"number_of_replicas\": 1}").get();
ensureGreen("test");
resp = client().prepareSearch().setQuery(matchAllQuery()).setPreference("_replica").execute().actionGet();
assertThat(resp.getHits().totalHits(), equalTo(1L));
}
public void testThatSpecifyingNonExistingNodesReturnsUsefulError() throws Exception {
createIndex("test");
ensureGreen();
try {
client().prepareSearch().setQuery(matchAllQuery()).setPreference("_only_nodes:DOES-NOT-EXIST").execute().actionGet();
fail("Expected IllegalArgumentException");
} catch (IllegalArgumentException e) {
assertThat(e, hasToString(containsString("no data nodes with criteria [DOES-NOT-EXIST] found for shard: [test][")));
}
}
public void testNodesOnlyRandom() throws Exception {
assertAcked(prepareCreate("test").setSettings(
//this test needs at least a replica to make sure two consecutive searches go to two different copies of the same data
Settings.builder().put(indexSettings()).put(SETTING_NUMBER_OF_REPLICAS, between(1, maximumNumberOfReplicas()))));
ensureGreen();
client().prepareIndex("test", "type1").setSource("field1", "value1").execute().actionGet();
refresh();
final Client client = internalCluster().smartClient();
SearchRequestBuilder request = client.prepareSearch("test")
.setQuery(matchAllQuery()).setPreference("_only_nodes:*,nodes*"); // multiple wildchar to cover multi-param usecase
assertSearchOnRandomNodes(request);
request = client.prepareSearch("test")
.setQuery(matchAllQuery()).setPreference("_only_nodes:*");
assertSearchOnRandomNodes(request);
ArrayList<String> allNodeIds = new ArrayList<>();
ArrayList<String> allNodeNames = new ArrayList<>();
ArrayList<String> allNodeHosts = new ArrayList<>();
NodesStatsResponse nodeStats = client().admin().cluster().prepareNodesStats().execute().actionGet();
for (NodeStats node : nodeStats.getNodes()) {
allNodeIds.add(node.getNode().getId());
allNodeNames.add(node.getNode().getName());
allNodeHosts.add(node.getHostname());
}
String node_expr = "_only_nodes:" + Strings.arrayToCommaDelimitedString(allNodeIds.toArray());
request = client.prepareSearch("test").setQuery(matchAllQuery()).setPreference(node_expr);
assertSearchOnRandomNodes(request);
node_expr = "_only_nodes:" + Strings.arrayToCommaDelimitedString(allNodeNames.toArray());
request = client.prepareSearch("test").setQuery(matchAllQuery()).setPreference(node_expr);
assertSearchOnRandomNodes(request);
node_expr = "_only_nodes:" + Strings.arrayToCommaDelimitedString(allNodeHosts.toArray());
request = client.prepareSearch("test").setQuery(matchAllQuery()).setPreference(node_expr);
assertSearchOnRandomNodes(request);
node_expr = "_only_nodes:" + Strings.arrayToCommaDelimitedString(allNodeHosts.toArray());
request = client.prepareSearch("test").setQuery(matchAllQuery()).setPreference(node_expr);
assertSearchOnRandomNodes(request);
// Mix of valid and invalid nodes
node_expr = "_only_nodes:*,invalidnode";
request = client.prepareSearch("test").setQuery(matchAllQuery()).setPreference(node_expr);
assertSearchOnRandomNodes(request);
}
private void assertSearchOnRandomNodes(SearchRequestBuilder request) {
Set<String> hitNodes = new HashSet<>();
for (int i = 0; i < 2; i++) {
SearchResponse searchResponse = request.execute().actionGet();
assertThat(searchResponse.getHits().getHits().length, greaterThan(0));
hitNodes.add(searchResponse.getHits().getAt(0).shard().getNodeId());
}
assertThat(hitNodes.size(), greaterThan(1));
}
}
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