add context stash/restore to write operation

Signed-off-by: Brian Flores <[email protected]>

Author: brianf-aws

plugin/src/main/java/org/opensearch/ml/action/undeploy/TransportUndeployModelsAction.java

@@ -15,6 +15,7 @@
 import org.opensearch.OpenSearchStatusException;
 import org.opensearch.action.ActionRequest;
 import org.opensearch.action.bulk.BulkRequest;
+import org.opensearch.action.bulk.BulkResponse;
 import org.opensearch.action.search.SearchRequest;
 import org.opensearch.action.search.SearchResponse;
 import org.opensearch.action.support.ActionFilters;
@@ -206,13 +207,22 @@ private void bulkSetModelIndexToUndeploy(
         bulkUpdateRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
         log.info("No nodes service: {}", Arrays.toString(modelIds));
 
-        client.bulk(bulkUpdateRequest, ActionListener.wrap(br -> {
-            log.debug("Successfully set modelIds to UNDEPLOY in index");
-            listener.onResponse(new MLUndeployModelsResponse(response));
-        }, e -> {
-            log.error("Failed to set modelIds to UNDEPLOY in index", e);
+        try (ThreadContext.StoredContext threadContext = client.threadPool().getThreadContext().stashContext()) {
+            ActionListener<MLUndeployModelsResponse> listenerWithContextRestoration = ActionListener.runBefore(listener, () -> threadContext.restore());
+            ActionListener<BulkResponse> bulkResponseListener = ActionListener.wrap(br -> {
+                log.debug("Successfully set modelIds to UNDEPLOY in index");
+                listenerWithContextRestoration.onResponse(new MLUndeployModelsResponse(response));
+            }, e -> {
+                log.error("Failed to set modelIds to UNDEPLOY in index", e);
+                listenerWithContextRestoration.onFailure(e);
+            });
+
+            client.bulk(bulkUpdateRequest, bulkResponseListener);
+        } catch (Exception e) {
+            log.error("Unexpected error while setting modelIds to UNDEPLOY status to index", e);
             listener.onFailure(e);
-        }));
+        }
+
     }
 
     private void validateAccess(String modelId, ActionListener<Boolean> listener) {