curl --request PUT \
  --url http://localhost:9200/my-knn-index-1/ \
  --header 'Content-Type: application/json' \
  --data '{
	"settings": {
		"index": {
			"number_of_shards": 1,
			"number_of_replicas": 0,
			"refresh_interval": "1s",
			"knn": true
		}
	},
	"mappings": {
		"properties": {
			"my_vector2": {
				"type": "knn_vector",
				"dimension": 4,
				"method": {
					"engine": "faiss",
					"name": "hnsw"
				}
			}
		}
	}
}'

curl --request PUT \
  --url http://localhost:9200/my-knn-index-1/_mappings \
  --header 'Content-Type: application/json' \
  --data '{
	"properties": {
		"my_vector2": {
			"type": "knn_vector",
			"dimension": 4
		}
	}
}'

{
	"error": {
		"root_cause": [
			{
				"type": "null_pointer_exception",
				"reason": "Cannot invoke \"org.opensearch.knn.index.engine.KNNMethodContext.getMethodComponentContext()\" because \"m\" is null"
			}
		],
		"type": "null_pointer_exception",
		"reason": "Cannot invoke \"org.opensearch.knn.index.engine.KNNMethodContext.getMethodComponentContext()\" because \"m\" is null"
	},
	"status": 500
}

[2025-02-25T00:07:03,874][WARN ][r.suppressed             ] [integTest-0] path: /my-knn-index-1/_mappings, params: {index=my-knn-index-1}
java.lang.NullPointerException: Cannot invoke "org.opensearch.knn.index.engine.KNNMethodContext.getMethodComponentContext()" because "m" is null
        at org.opensearch.knn.index.mapper.KNNVectorFieldMapper$Builder.lambda$new$13(KNNVectorFieldMapper.java:165) ~[?:?]
        at org.opensearch.index.mapper.ParametrizedFieldMapper$Parameter.merge(ParametrizedFieldMapper.java:347) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.index.mapper.ParametrizedFieldMapper$Builder.merge(ParametrizedFieldMapper.java:619) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.index.mapper.ParametrizedFieldMapper.merge(ParametrizedFieldMapper.java:128) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.index.mapper.ParametrizedFieldMapper.merge(ParametrizedFieldMapper.java:77) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.index.mapper.ObjectMapper.doMerge(ObjectMapper.java:821) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.index.mapper.RootObjectMapper.doMerge(RootObjectMapper.java:363) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.index.mapper.ObjectMapper.merge(ObjectMapper.java:780) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.index.mapper.RootObjectMapper.merge(RootObjectMapper.java:358) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.index.mapper.Mapping.merge(Mapping.java:130) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.index.mapper.DocumentMapper.merge(DocumentMapper.java:313) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.cluster.metadata.MetadataMappingService$PutMappingExecutor.applyRequest(MetadataMappingService.java:284) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.cluster.metadata.MetadataMappingService$PutMappingExecutor.execute(MetadataMappingService.java:245) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.cluster.service.ClusterManagerService.executeTasks(ClusterManagerService.java:889) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.cluster.service.ClusterManagerService.calculateTaskOutputs(ClusterManagerService.java:441) ~[opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.cluster.service.ClusterManagerService.runTasks(ClusterManagerService.java:301) [opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.cluster.service.ClusterManagerService$Batcher.run(ClusterManagerService.java:214) [opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.cluster.service.TaskBatcher.runIfNotProcessed(TaskBatcher.java:206) [opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.cluster.service.TaskBatcher$BatchedTask.run(TaskBatcher.java:264) [opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:935) [opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.common.util.concurrent.PrioritizedOpenSearchThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedOpenSearchThreadPoolExecutor.java:283) [opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at org.opensearch.common.util.concurrent.PrioritizedOpenSearchThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedOpenSearchThreadPoolExecutor.java:246) [opensearch-3.0.0-alpha1-SNAPSHOT.jar:3.0.0-alpha1-SNAPSHOT]
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) [?:?]
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) [?:?]
        at java.base/java.lang.Thread.run(Thread.java:1575) [?:?]