adding change log, fix casting

Signed-off-by: Amit Galitzky <[email protected]>

CHANGELOG.md

@@ -25,6 +25,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 - Hide user and credential field from search response ([#680](https://github.com/opensearch-project/flow-framework/pull/680))
 - Throw the correct error message in status API for WorkflowSteps ([#676](https://github.com/opensearch-project/flow-framework/pull/676))
 - Delete workflow state when template is deleted and no resources exist ([#689](https://github.com/opensearch-project/flow-framework/pull/689))
+- Fixing model group parsing and restoring context ([#695] (https://github.com/opensearch-project/flow-framework/pull/695))
 
 ### Infrastructure
 - Switch macos runner to macos-13 from macos-latest since macos-latest is now arm64 ([#686](https://github.com/opensearch-project/flow-framework/pull/686))

release-notes/opensearch-flow-framework.release-notes-2.14.0.0.md

@@ -13,6 +13,8 @@ Compatible with OpenSearch 2.14.0
 - Hide user and credential field from search response ([#680](https://github.com/opensearch-project/flow-framework/pull/680))
 - Throw the correct error message in status API for WorkflowSteps ([#676](https://github.com/opensearch-project/flow-framework/pull/676))
 - Delete workflow state when template is deleted and no resources exist ([#689](https://github.com/opensearch-project/flow-framework/pull/689))
+- Fixing model group parsing and restoring context ([#695] (https://github.com/opensearch-project/flow-framework/pull/695))
+
 
 ### Infrastructure
 - Switch macOS runner to macos-13 from macos-latest since macos-latest is now arm64 ([#686](https://github.com/opensearch-project/flow-framework/pull/686))

src/main/java/org/opensearch/flowframework/workflow/RegisterModelGroupStep.java

@@ -143,7 +143,10 @@ public void onFailure(Exception ex) {
             String modelGroupName = (String) inputs.get(NAME_FIELD);
             String description = (String) inputs.get(DESCRIPTION_FIELD);
             List<String> backendRoles = getBackendRoles(inputs);
-            AccessMode modelAccessMode = AccessMode.from(((String) inputs.get(MODEL_ACCESS_MODE)).toLowerCase(Locale.ROOT));
+            AccessMode modelAccessMode = null;
+            if (inputs.get(MODEL_ACCESS_MODE) != null) {
+                modelAccessMode = AccessMode.from((inputs.get(MODEL_ACCESS_MODE)).toString().toLowerCase(Locale.ROOT));
+            }
             Boolean isAddAllBackendRoles = inputs.containsKey(ADD_ALL_BACKEND_ROLES)
                 ? Booleans.parseBoolean(inputs.get(ADD_ALL_BACKEND_ROLES).toString())
                 : null;