[Backport to main] tune error message for no ML node case

plugin/src/main/java/org/opensearch/ml/task/MLTaskDispatcher.java

@@ -167,7 +167,12 @@ private void dispatchTaskWithLeastLoad(ActionListener<DiscoveryNode> listener) {
     private void dispatchTaskWithRoundRobin(ActionListener<DiscoveryNode> listener) {
         DiscoveryNode[] eligibleNodes = nodeHelper.getEligibleNodes();
         if (eligibleNodes == null || eligibleNodes.length == 0) {
-            throw new MLResourceNotFoundException("no eligible node found, ml node is required to run this request");
+            throw new MLResourceNotFoundException(
+                "No eligible node found to execute this request. It's best practice to"
+                    + " provision ML nodes to serve your models. You can disable this setting to serve the model on your data"
+                    + " node for development purposes by disabling the \"plugins.ml_commons.only_run_on_ml_node\" "
+                    + "configuration using the _cluster/setting api"
+            );
         }
         dispatchTaskWithRoundRobin(eligibleNodes, listener);
     }

release-notes/opensearch-ml-common.release-notes-2.5.0.0.md

@@ -0,0 +1,35 @@
+## Version 2.5.0.0 Release Notes
+
+Compatible with OpenSearch 2.5.0
+
+### Features
+* Add native memory circuit breaker. ([#689](https://github.com/opensearch-project/ml-commons/pull/689))
+
+### Enhancements
+* add more parameters for text embedding model ([#640](https://github.com/opensearch-project/ml-commons/pull/640))
+* add more pooling method and refactor ([#672](https://github.com/opensearch-project/ml-commons/pull/672))
+* add ML task timeout setting and clean up expired tasks from cache ([#662](https://github.com/opensearch-project/ml-commons/pull/662))
+* change only run on ml node setting default value to true ([#686](https://github.com/opensearch-project/ml-commons/pull/686))
+
+### Infrastructure
+* unit tests coverage for load/unload/syncup ([#592](https://github.com/opensearch-project/ml-commons/pull/592))
+* Add .whitesource configuration file ([#626](https://github.com/opensearch-project/ml-commons/pull/626))
+* bump djl to 0.20 and add onnxruntime-gpu dependency ([#644](https://github.com/opensearch-project/ml-commons/pull/644))
+* Remove jackson-databind and jackson-annotations dependencies now coming from core ([#652](https://github.com/opensearch-project/ml-commons/pull/652))
+* Revert "Remove jackson-databind and jackson-annotations dependencies now coming from core" ([#687](https://github.com/opensearch-project/ml-commons/pull/687))
+* Adding backwards compatibility test for ml-commons plugin ([#681](https://github.com/opensearch-project/ml-commons/pull/681))
+* Change the inheritance of the BWC test file ([#692](https://github.com/opensearch-project/ml-commons/pull/692))
+
+### Documentation
+
+* Updated MAINTAINERS.md format ([#668](https://github.com/opensearch-project/ml-commons/pull/668))
+* Updating maintainers list ([#663](https://github.com/opensearch-project/ml-commons/pull/663))
+* add doc about how to setup GPU ML node ([#677](https://github.com/opensearch-project/ml-commons/pull/677))
+
+### Maintenance
+
+* Increment version to 2.5.0-SNAPSHOT ([#513](https://github.com/opensearch-project/ml-commons/pull/513))
+
+### Refactoring
+
+* change task worker node to list; add target worker node to cache ([#656](https://github.com/opensearch-project/ml-commons/pull/656))