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[CCR] Retry when no index shard stats can be found (#34852)
Index shard stats for the follower shard are fetched, when a shard follow task is started. This is needed in order to bootstap the shard follow task with the follower global checkpoint. Sometimes index shard stats are not available (e.g. during a restart) and we fail now, while it is very likely that these stats will be available some time later.
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62 changes: 62 additions & 0 deletions
62
x-pack/plugin/ccr/src/test/java/org/elasticsearch/xpack/ccr/RestartIndexFollowingIT.java
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| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License; | ||
| * you may not use this file except in compliance with the Elastic License. | ||
| */ | ||
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| package org.elasticsearch.xpack.ccr; | ||
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| import org.elasticsearch.common.xcontent.XContentType; | ||
| import org.elasticsearch.index.IndexSettings; | ||
| import org.elasticsearch.xpack.CcrIntegTestCase; | ||
| import org.elasticsearch.xpack.core.ccr.action.PutFollowAction; | ||
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| import java.util.Locale; | ||
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| import static java.util.Collections.singletonMap; | ||
| import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked; | ||
| import static org.hamcrest.Matchers.equalTo; | ||
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| public class RestartIndexFollowingIT extends CcrIntegTestCase { | ||
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| @Override | ||
| protected int numberOfNodesPerCluster() { | ||
| return 1; | ||
| } | ||
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| public void testFollowIndex() throws Exception { | ||
| final String leaderIndexSettings = getIndexSettings(1, 0, | ||
| singletonMap(IndexSettings.INDEX_SOFT_DELETES_SETTING.getKey(), "true")); | ||
| singletonMap(IndexSettings.INDEX_SOFT_DELETES_SETTING.getKey(), "true"); | ||
| assertAcked(leaderClient().admin().indices().prepareCreate("index1").setSource(leaderIndexSettings, XContentType.JSON)); | ||
| ensureLeaderGreen("index1"); | ||
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| final PutFollowAction.Request followRequest = putFollow("index1", "index2"); | ||
| followerClient().execute(PutFollowAction.INSTANCE, followRequest).get(); | ||
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| final long firstBatchNumDocs = randomIntBetween(2, 64); | ||
| logger.info("Indexing [{}] docs as first batch", firstBatchNumDocs); | ||
| for (int i = 0; i < firstBatchNumDocs; i++) { | ||
| final String source = String.format(Locale.ROOT, "{\"f\":%d}", i); | ||
| leaderClient().prepareIndex("index1", "doc", Integer.toString(i)).setSource(source, XContentType.JSON).get(); | ||
| } | ||
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| assertBusy(() -> { | ||
| assertThat(followerClient().prepareSearch("index2").get().getHits().totalHits, equalTo(firstBatchNumDocs)); | ||
| }); | ||
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| getFollowerCluster().fullRestart(); | ||
| ensureFollowerGreen("index2"); | ||
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| final long secondBatchNumDocs = randomIntBetween(2, 64); | ||
| for (int i = 0; i < secondBatchNumDocs; i++) { | ||
| leaderClient().prepareIndex("index1", "doc").setSource("{}", XContentType.JSON).get(); | ||
| } | ||
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| assertBusy(() -> { | ||
| assertThat(followerClient().prepareSearch("index2").get().getHits().totalHits, | ||
| equalTo(firstBatchNumDocs + secondBatchNumDocs)); | ||
| }); | ||
| } | ||
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| } |