Catch error if index patterns service can't be created.

src/plugins/data/server/autocomplete/value_suggestions_route.ts

@@ -46,6 +46,10 @@ export function registerValueSuggestionsRoute(
       const { index } = request.params;
       const signal = getRequestAbortedSignal(request.events.aborted$);
 
+      if (!context.indexPatterns) {
+        return response.badRequest();
+      }
+
       const autocompleteSearchOptions = {
         timeout: `${config.kibana.autocompleteTimeout.asMilliseconds()}ms`,
         terminate_after: config.kibana.autocompleteTerminateAfter.asMilliseconds(),

src/plugins/data/server/index_patterns/index_patterns_service.ts

@@ -36,6 +36,7 @@ export interface IndexPatternsServiceStart {
 
 export interface IndexPatternsServiceSetupDeps {
   expressions: ExpressionsServerSetup;
+  logger: Logger;
 }
 
 export interface IndexPatternsServiceStartDeps {
@@ -46,7 +47,7 @@ export interface IndexPatternsServiceStartDeps {
 export class IndexPatternsServiceProvider implements Plugin<void, IndexPatternsServiceStart> {
   public setup(
     core: CoreSetup<DataPluginStartDependencies, DataPluginStart>,
-    { expressions }: IndexPatternsServiceSetupDeps
+    { logger, expressions }: IndexPatternsServiceSetupDeps
   ) {
     core.savedObjects.registerType(indexPatternSavedObjectType);
     core.capabilities.registerProvider(capabilitiesProvider);
@@ -55,10 +56,15 @@ export class IndexPatternsServiceProvider implements Plugin<void, IndexPatternsS
       'indexPatterns',
       async (context, request) => {
         const [coreStart, , dataStart] = await core.getStartServices();
-        return await dataStart.indexPatterns.indexPatternsServiceFactory(
-          coreStart.savedObjects.getScopedClient(request),
-          coreStart.elasticsearch.client.asScoped(request).asCurrentUser
-        );
+        try {
+          return await dataStart.indexPatterns.indexPatternsServiceFactory(
+            coreStart.savedObjects.getScopedClient(request),
+            coreStart.elasticsearch.client.asScoped(request).asCurrentUser
+          );
+        } catch (e) {
+          logger.error(e);
+          return undefined;
+        }
       }
     );
 

src/plugins/data/server/plugin.ts

@@ -82,7 +82,10 @@ export class DataServerPlugin
     this.queryService.setup(core);
     this.autocompleteService.setup(core);
     this.kqlTelemetryService.setup(core, { usageCollection });
-    this.indexPatterns.setup(core, { expressions });
+    this.indexPatterns.setup(core, {
+      expressions,
+      logger: this.logger.get('indexPatterns'),
+    });
 
     core.uiSettings.register(getUiSettings());
 

src/plugins/data/server/types.ts

@@ -16,7 +16,7 @@ import { IndexPatternsHandlerContext } from './index_patterns';
  */
 export interface DataRequestHandlerContext extends RequestHandlerContext {
   search: SearchRequestHandlerContext;
-  indexPatterns: IndexPatternsHandlerContext;
+  indexPatterns?: IndexPatternsHandlerContext;
 }
 
 export type DataPluginRouter = IRouter<DataRequestHandlerContext>;