[BUG] 408 response with incorrect information returned from GET _cluster/health/<index> given nonexistent index #19022
Description
Describe the bug
Request:
curl -X GET "https://localhost:9200/_cluster/health/fake-index-doesnt-exist?level=shards&pretty" -u admin:admin -k
408 response with body:
{
"cluster_name" : "opensearch-cluster",
"status" : "red",
"timed_out" : true,
"number_of_nodes" : 3,
"number_of_data_nodes" : 3,
"discovered_master" : true,
"discovered_cluster_manager" : true,
"active_primary_shards" : 0,
"active_shards" : 0,
"relocating_shards" : 0,
"initializing_shards" : 0,
"unassigned_shards" : 0,
"delayed_unassigned_shards" : 0,
"number_of_pending_tasks" : 0,
"number_of_in_flight_fetch" : 0,
"task_max_waiting_in_queue_millis" : 0,
"active_shards_percent_as_number" : 100.0,
"indices" : { }
}
This is misleading as the cluster is actually green status, the problem is just no index with that name exists. If the index does not exist, I would expect it to return a 404 error response.
Related component
Other
To Reproduce
- GET _cluster/health/fake-index-doesnt-exist
- Observe request timeout (408 error) with response body indicating the cluster is not healthy
Expected behavior
404 response indicating the index does not exist, no mis-indication that the cluster health is red
Additional Details
"version" : {
"distribution" : "opensearch",
"number" : "3.1.0",
"build_type" : "tar",
"build_hash" : "8ff7c6ee924a49f0f59f80a6e1c73073c8904214",
"build_date" : "2025-06-21T08:05:43.345081313Z",
"build_snapshot" : false,
"lucene_version" : "10.2.1",
"minimum_wire_compatibility_version" : "2.19.0",
"minimum_index_compatibility_version" : "2.0.0"
}