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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.index.store;
import org.elasticsearch.action.admin.cluster.node.stats.NodeStats;
import org.elasticsearch.action.admin.cluster.node.stats.NodesStatsResponse;
import org.elasticsearch.action.bulk.BulkItemResponse;
import org.elasticsearch.action.bulk.BulkRequestBuilder;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.bulk.TransportShardBulkAction;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.discovery.Discovery;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.test.ESIntegTestCase;
import org.elasticsearch.test.transport.MockTransportService;
import org.elasticsearch.transport.ConnectTransportException;
import org.elasticsearch.transport.TransportException;
import org.elasticsearch.transport.TransportRequest;
import org.elasticsearch.transport.TransportRequestOptions;
import org.elasticsearch.transport.TransportService;
import java.io.IOException;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.atomic.AtomicBoolean;
import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
import static org.elasticsearch.index.query.QueryBuilders.termQuery;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertHitCount;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertSearchResponse;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.Matchers.greaterThan;
@ESIntegTestCase.ClusterScope(scope = ESIntegTestCase.Scope.SUITE)
public class ExceptionRetryIT extends ESIntegTestCase {
@Override
protected Collection<Class<? extends Plugin>> nodePlugins() {
return pluginList(MockTransportService.TestPlugin.class);
}
@Override
protected void beforeIndexDeletion() {
// a write operation might still be in flight when the test has finished
// so we should not check the operation counter here
}
/**
* Tests retry mechanism when indexing. If an exception occurs when indexing then the indexing request is tried again before finally failing.
* If auto generated ids are used this must not lead to duplicate ids
* see https://github.com/elasticsearch/elasticsearch/issues/8788
*/
public void testRetryDueToExceptionOnNetworkLayer() throws ExecutionException, InterruptedException, IOException {
final AtomicBoolean exceptionThrown = new AtomicBoolean(false);
int numDocs = scaledRandomIntBetween(100, 1000);
NodesStatsResponse nodeStats = client().admin().cluster().prepareNodesStats().get();
NodeStats unluckyNode = randomFrom(nodeStats.getNodes());
assertAcked(client().admin().indices().prepareCreate("index"));
ensureGreen("index");
//create a transport service that throws a ConnectTransportException for one bulk request and therefore triggers a retry.
for (NodeStats dataNode : nodeStats.getNodes()) {
MockTransportService mockTransportService = ((MockTransportService) internalCluster().getInstance(TransportService.class, dataNode.getNode().name()));
mockTransportService.addDelegate(internalCluster().getInstance(TransportService.class, unluckyNode.getNode().name()), new MockTransportService.DelegateTransport(mockTransportService.original()) {
@Override
public void sendRequest(DiscoveryNode node, long requestId, String action, TransportRequest request, TransportRequestOptions options) throws IOException, TransportException {
super.sendRequest(node, requestId, action, request, options);
if (action.equals(TransportShardBulkAction.ACTION_NAME) && !exceptionThrown.get()) {
logger.debug("Throw ConnectTransportException");
exceptionThrown.set(true);
throw new ConnectTransportException(node, action);
}
}
});
}
BulkRequestBuilder bulkBuilder = client().prepareBulk();
for (int i = 0; i < numDocs; i++) {
XContentBuilder doc = null;
doc = jsonBuilder().startObject().field("foo", "bar").endObject();
bulkBuilder.add(client().prepareIndex("index", "type").setSource(doc));
}
BulkResponse response = bulkBuilder.get();
if (response.hasFailures()) {
for (BulkItemResponse singleIndexRespons : response.getItems()) {
if (singleIndexRespons.isFailed()) {
fail("None of the bulk items should fail but got " + singleIndexRespons.getFailureMessage());
}
}
}
refresh();
SearchResponse searchResponse = client().prepareSearch("index").setSize(numDocs * 2).addField("_id").get();
Set<String> uniqueIds = new HashSet();
long dupCounter = 0;
boolean found_duplicate_already = false;
for (int i = 0; i < searchResponse.getHits().getHits().length; i++) {
if (!uniqueIds.add(searchResponse.getHits().getHits()[i].getId())) {
if (!found_duplicate_already) {
SearchResponse dupIdResponse = client().prepareSearch("index").setQuery(termQuery("_id", searchResponse.getHits().getHits()[i].getId())).setExplain(true).get();
assertThat(dupIdResponse.getHits().totalHits(), greaterThan(1l));
logger.info("found a duplicate id:");
for (SearchHit hit : dupIdResponse.getHits()) {
logger.info("Doc {} was found on shard {}", hit.getId(), hit.getShard().getShardId());
}
logger.info("will not print anymore in case more duplicates are found.");
found_duplicate_already = true;
}
dupCounter++;
}
}
assertSearchResponse(searchResponse);
assertThat(dupCounter, equalTo(0l));
assertHitCount(searchResponse, numDocs);
}
}
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