diff --git a/alerting/src/main/kotlin/org/opensearch/alerting/InputService.kt b/alerting/src/main/kotlin/org/opensearch/alerting/InputService.kt
index 2829bc26a..80ccef0f6 100644
--- a/alerting/src/main/kotlin/org/opensearch/alerting/InputService.kt
+++ b/alerting/src/main/kotlin/org/opensearch/alerting/InputService.kt
@@ -10,6 +10,8 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.async
 import kotlinx.coroutines.awaitAll
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.newSingleThreadContext
+import kotlinx.coroutines.withContext
 import org.apache.logging.log4j.LogManager
 import org.opensearch.action.search.SearchRequest
 import org.opensearch.action.search.SearchResponse
@@ -132,19 +134,23 @@ class InputService(
                             client.threadPool().threadContext.stashContext().use {
                                 val responseMap = mutableMapOf<String, Map<String, Any>>()
                                 scope.launch {
-                                    val deferredResults = input.clusters.map { cluster ->
-                                        async {
-                                            val targetClient = CrossClusterMonitorUtils.getClientForCluster(cluster, client, clusterService)
-                                            val response = executeTransportAction(input, targetClient)
-                                            // Not all supported API reference the cluster name in their response.
-                                            // Mapping each response to the cluster name before adding to results.
-                                            // Not adding this same logic for local-only monitors to avoid breaking existing monitors.
-                                            cluster to response.toMap()
+                                    val singleThreadContext = newSingleThreadContext("ClusterMetricsInputThread")
+                                    withContext(singleThreadContext) {
+                                        val deferredResults = input.clusters.map { cluster ->
+                                            async {
+                                                val targetClient = CrossClusterMonitorUtils.getClientForCluster(cluster, client, clusterService)
+                                                val response = executeTransportAction(input, targetClient)
+                                                // Not all supported API reference the cluster name in their response.
+                                                // Mapping each response to the cluster name before adding to results.
+                                                // Not adding this same logic for local-only monitors to avoid breaking existing monitors.
+                                                cluster to response.toMap()
+                                            }
                                         }
-                                    }
 
-                                    val awaitedResults = deferredResults.awaitAll()
-                                    responseMap.putAll(awaitedResults)
+                                        val awaitedResults = deferredResults.awaitAll()
+                                        responseMap.putAll(awaitedResults)
+                                        results += responseMap
+                                    }
 
 //                                    input.clusters.forEach { cluster ->
 //                                        val targetClient = CrossClusterMonitorUtils.getClientForCluster(cluster, client, clusterService)
@@ -155,7 +161,6 @@ class InputService(
 //                                        responseMap[cluster] = response.toMap()
 //                                    }
                                 }
-                                results += responseMap
                             }
                             // todo hurneyt delete?
 //                            while (responseMap.size < input.clusters.size) {