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Ensure index templates are not applied to system indices #16418

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Ensure index templates are not applied to system indices #16418

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9d80a9d
fix: ensure system indices are processed without templates
pyek-bot Oct 22, 2024
f51c296
refactor: overloaded method for creating without templates
pyek-bot Oct 22, 2024
d838ec2
test: adding test to check call for notemplates on system index
pyek-bot Oct 22, 2024
e1090f0
refactor: cchange modifier to package private and add entry in changelog
pyek-bot Oct 23, 2024
09a27c9
fix conflicts and merge main
pyek-bot Oct 23, 2024
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7 changes: 7 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 @@ -443,6 +443,13 @@ public ClusterState applyCreateIndexRequest(

// The backing index may have a different name or prefix than the data stream name.
final String name = request.dataStreamName() != null ? request.dataStreamName() : request.index();
// Do not apply any templates to system indices
// Using applyCreateIndexRequestWithV1Templates with empty list instead of applyCreateIndexRequestWithV2Template with null
// template as applyCreateIndexRequestWithV2Template has assertions when template is null
if (systemIndices.isSystemIndex(name)) {
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return applyCreateIndexRequestWithV1Templates(currentState, request, silent, Collections.emptyList(), metadataTransformer);
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}

// Check to see if a v2 template matched
final String v2Template = MetadataIndexTemplateService.findV2Template(
currentState.metadata(),
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