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[BUG] Reject explicitly set empty index.store.type (GH#22550) #22592

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[BUG] Reject explicitly set empty index.store.type (GH#22550) #22592

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9 changes: 9 additions & 0 deletions server/src/main/java/org/opensearch/cluster/metadata/MetadataCreateIndexService.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1402,6 +1402,15 @@ public static void updatePluggableDataFormatSettings(
}

public static void validateStoreTypeSettings(Settings settings) {
// Reject explicitly set empty store type (GH#22550)
if (IndexModule.INDEX_STORE_TYPE_SETTING.exists(settings)) {
String storeType = IndexModule.INDEX_STORE_TYPE_SETTING.get(settings);
if (storeType.isEmpty()) {
throw new IllegalArgumentException(
"Failed to parse value for setting [" + IndexModule.INDEX_STORE_TYPE_SETTING.getKey() + "] must not be empty"
);
}
Comment on lines +1406 to +1412

@navneet1v navneet1v Jul 28, 2026

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can we add a unit test for this change

}
// deprecate simplefs store type:
if (IndexModule.Type.SIMPLEFS.match(IndexModule.INDEX_STORE_TYPE_SETTING.get(settings))) {
DEPRECATION_LOGGER.deprecate(
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