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Fix null value usage for index.number_of_routing_shards setting. #76069

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merged 3 commits into from
Aug 5, 2021
Merged

Fix null value usage for index.number_of_routing_shards setting. #76069

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9f69776
Fix null value usage for index.number_of_routing_shards setting.
martijnvg Aug 4, 2021
510ab00
Merge remote-tracking branch 'es/master' into fix/75139
martijnvg Aug 5, 2021
7366dc6
adjusted unit testing
martijnvg Aug 5, 2021
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4 changes: 3 additions & 1 deletion server/src/main/java/org/elasticsearch/cluster/metadata/MetadataCreateIndexService.java
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Original file line number Diff line number Diff line change
Expand Up @@ -819,7 +819,9 @@ static int getIndexNumberOfRoutingShards(Settings indexSettings, @Nullable Index
// in this case we either have no index to recover from or
// we have a source index with 1 shard and without an explicit split factor
// or one that is valid in that case we can split into whatever and auto-generate a new factor.
if (IndexMetadata.INDEX_NUMBER_OF_ROUTING_SHARDS_SETTING.exists(indexSettings)) {
// (Don't use IndexMetadata.INDEX_NUMBER_OF_ROUTING_SHARDS_SETTING.get(indexSettings) here, otherwise
// we get the default value when `null` has been provided as value)
if (indexSettings.get(IndexMetadata.INDEX_NUMBER_OF_ROUTING_SHARDS_SETTING.getKey()) != null) {
routingNumShards = IndexMetadata.INDEX_NUMBER_OF_ROUTING_SHARDS_SETTING.get(indexSettings);
} else {
routingNumShards = calculateNumRoutingShards(numTargetShards, indexVersionCreated);
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9 changes: 9 additions & 0 deletions server/src/test/java/org/elasticsearch/cluster/metadata/MetadataCreateIndexServiceTests.java
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Expand Up @@ -900,6 +900,15 @@ public void testGetIndexNumberOfRoutingShardsWhenExplicitlyConfigured() {
assertThat(targetRoutingNumberOfShards, is(9));
}

public void testGetIndexNumberOfRoutingShardsWhenNullConfigured() {
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Settings indexSettings = settings(Version.CURRENT)
.put(INDEX_NUMBER_OF_ROUTING_SHARDS_SETTING.getKey(), (String) null)
.put(INDEX_NUMBER_OF_SHARDS_SETTING.getKey(), 2)
.build();
int targetRoutingNumberOfShards = getIndexNumberOfRoutingShards(indexSettings, null);
assertThat(targetRoutingNumberOfShards, is(1024));
}

public void testGetIndexNumberOfRoutingShardsYieldsSourceNumberOfShards() {
Settings indexSettings = Settings.builder()
.put(INDEX_NUMBER_OF_SHARDS_SETTING.getKey(), 3)
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