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Add another note to maybeValidateDataStreamsStillReferenced #135805

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Merged
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Oct 2, 2025
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Add another note to maybeValidateDataStreamsStillReferenced #135805

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3 changes: 3 additions & 0 deletions server/src/main/java/org/elasticsearch/cluster/metadata/MetadataIndexTemplateService.java
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Original file line number Diff line number Diff line change
Expand Up @@ -965,6 +965,9 @@ private static void maybeValidateDataStreamsStillReferenced(
// We check whether anything relevant has changed that could affect data stream coverage and return early if not.
// These checks are based on the implementation of findV2Template and the data stream template check in this method.
// If we're adding a new template, we do the full check in case this template's priority changes coverage.
// Note that this method is also run for component templates, and that component templates can configure the
// `index.hidden` setting. In that case, we'd never take this shortcut as we're comparing a composite template
// with a composable template (i.e. we don't take component templates into account for the existing template).
if (existingTemplate != null
&& Objects.equals(existingTemplate.indexPatterns(), newTemplate.indexPatterns())
&& Objects.equals(existingSettings.get(IndexMetadata.SETTING_INDEX_HIDDEN), newSettings.get(IndexMetadata.SETTING_INDEX_HIDDEN))
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