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RestoreService should update primary terms when restoring shards of existing indices #38177

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Feb 1, 2019
Merged

RestoreService should update primary terms when restoring shards of existing indices #38177

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6 changes: 6 additions & 0 deletions server/src/main/java/org/elasticsearch/snapshots/RestoreService.java
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Original file line number Diff line number Diff line change
Expand Up @@ -314,6 +314,12 @@ public ClusterState execute(ClusterState currentState) {
currentIndexMetaData.getMappingVersion() + 1));
indexMdBuilder.settingsVersion(Math.max(snapshotIndexMetaData.getSettingsVersion(),
currentIndexMetaData.getSettingsVersion() + 1));

for (int shard = 0; shard < snapshotIndexMetaData.getNumberOfShards(); shard++) {
indexMdBuilder.primaryTerm(shard,
Math.max(snapshotIndexMetaData.primaryTerm(shard), currentIndexMetaData.primaryTerm(shard)));
}

if (!request.includeAliases()) {
// Remove all snapshot aliases
if (!snapshotIndexMetaData.getAliases().isEmpty()) {
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43 changes: 43 additions & 0 deletions server/src/test/java/org/elasticsearch/snapshots/SharedClusterSnapshotRestoreIT.java
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Original file line number Diff line number Diff line change
Expand Up @@ -116,6 +116,7 @@
import java.util.function.Consumer;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;

import static org.elasticsearch.cluster.metadata.IndexMetaData.SETTING_NUMBER_OF_REPLICAS;
Expand Down Expand Up @@ -3704,6 +3705,48 @@ public void testAbortedSnapshotDuringInitDoesNotStart() throws Exception {
}
}

public void testRestoreIncreasesPrimaryTerms() {
final String indexName = randomAlphaOfLengthBetween(5, 10).toLowerCase(Locale.ROOT);
createIndex(indexName, Settings.builder()
.put(SETTING_NUMBER_OF_SHARDS, 2)
.put(SETTING_NUMBER_OF_REPLICAS, 0)
.build());
ensureGreen(indexName);

if (randomBoolean()) {
// open and close the index to increase the primary terms
for (int i = 0; i < randomInt(3); i++) {
assertAcked(client().admin().indices().prepareClose(indexName));
assertAcked(client().admin().indices().prepareOpen(indexName));
}
}

final IndexMetaData indexMetaData = client().admin().cluster().prepareState().clear().setIndices(indexName)
.setMetaData(true).get().getState().metaData().index(indexName);
final int numPrimaries = getNumShards(indexName).numPrimaries;
final Map<Integer, Long> primaryTerms = IntStream.range(0, numPrimaries)
.boxed().collect(Collectors.toMap(shardId -> shardId, indexMetaData::primaryTerm));

assertAcked(client().admin().cluster().preparePutRepository("test-repo").setType("fs").setSettings(randomRepoSettings()));
final CreateSnapshotResponse createSnapshotResponse = client().admin().cluster().prepareCreateSnapshot("test-repo", "test-snap")
.setWaitForCompletion(true).setIndices(indexName).get();
assertThat(createSnapshotResponse.getSnapshotInfo().successfulShards(), equalTo(numPrimaries));
assertThat(createSnapshotResponse.getSnapshotInfo().failedShards(), equalTo(0));

assertAcked(client().admin().indices().prepareClose(indexName));

final RestoreSnapshotResponse restoreSnapshotResponse = client().admin().cluster().prepareRestoreSnapshot("test-repo", "test-snap")
.setWaitForCompletion(true).get();
assertThat(restoreSnapshotResponse.getRestoreInfo().successfulShards(), equalTo(numPrimaries));
assertThat(restoreSnapshotResponse.getRestoreInfo().failedShards(), equalTo(0));

final IndexMetaData restoredIndexMetaData = client().admin().cluster().prepareState().clear().setIndices(indexName)
.setMetaData(true).get().getState().metaData().index(indexName);
for (int shardId = 0; shardId < numPrimaries; shardId++) {
assertThat(restoredIndexMetaData.primaryTerm(shardId), equalTo(primaryTerms.get(shardId) + 1));
}
}

private RepositoryData getRepositoryData(Repository repository) throws InterruptedException {
ThreadPool threadPool = internalCluster().getInstance(ThreadPool.class, internalCluster().getMasterName());
final SetOnce<RepositoryData> repositoryData = new SetOnce<>();
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