Making _cat/allocation API use indexLevelStats

Signed-off-by: Harsh Garg <gkharsh@amazon.com>
opensearch-project · Sep 6, 2024 · 75e470c · 75e470c
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diff --git a/release-notes/opensearch.release-notes-2.17.0.md b/release-notes/opensearch.release-notes-2.17.0.md
@@ -52,6 +52,7 @@
 - Reset DiscoveryNodes in all transport node actions request ([#15131](https://github.com/opensearch-project/OpenSearch/pull/15131))
 - MultiTermQueries in keyword fields now default to `indexed` approach and gated behind cluster setting ([#15637](https://github.com/opensearch-project/OpenSearch/pull/15637))
 - Adding WithFieldName interface for QueryBuilders with fieldName ([#15705](https://github.com/opensearch-project/OpenSearch/pull/15705))
+- Making _cat/allocation API use indexLevelStats ([#15292](https://github.com/opensearch-project/OpenSearch/pull/15292))
 
 ### Dependencies
 - Bump `netty` from 4.1.111.Final to 4.1.112.Final ([#15081](https://github.com/opensearch-project/OpenSearch/pull/15081))

diff --git a/server/src/main/java/org/opensearch/rest/action/cat/RestAllocationAction.java b/server/src/main/java/org/opensearch/rest/action/cat/RestAllocationAction.java
@@ -101,6 +101,7 @@ public void processResponse(final ClusterStateResponse state) {
                 statsRequest.clear()
                     .addMetric(NodesStatsRequest.Metric.FS.metricName())
                     .indices(new CommonStatsFlags(CommonStatsFlags.Flag.Store));
+                statsRequest.indices().setIncludeIndicesStatsByLevel(true);
 
                 client.admin().cluster().nodesStats(statsRequest, new RestResponseListener<NodesStatsResponse>(channel) {
                     @Override