[data.search] Handle warnings inside of headers

docs/development/plugins/data/public/kibana-plugin-plugins-data-public.ikibanasearchresponse.md

@@ -21,4 +21,5 @@ export interface IKibanaSearchResponse<RawResponse = any>
 |  [loaded](./kibana-plugin-plugins-data-public.ikibanasearchresponse.loaded.md) | <code>number</code> | If relevant to the search strategy, return a loaded number that represents how progress is indicated. |
 |  [rawResponse](./kibana-plugin-plugins-data-public.ikibanasearchresponse.rawresponse.md) | <code>RawResponse</code> | The raw response returned by the internal search method (usually the raw ES response) |
 |  [total](./kibana-plugin-plugins-data-public.ikibanasearchresponse.total.md) | <code>number</code> | If relevant to the search strategy, return a total number that represents how progress is indicated. |
+|  [warning](./kibana-plugin-plugins-data-public.ikibanasearchresponse.warning.md) | <code>string</code> | Optional warnings that should be surfaced to the end user |
 

docs/development/plugins/data/public/kibana-plugin-plugins-data-public.ikibanasearchresponse.warning.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-plugins-data-public](./kibana-plugin-plugins-data-public.md) &gt; [IKibanaSearchResponse](./kibana-plugin-plugins-data-public.ikibanasearchresponse.md) &gt; [warning](./kibana-plugin-plugins-data-public.ikibanasearchresponse.warning.md)
+
+## IKibanaSearchResponse.warning property
+
+Optional warnings that should be surfaced to the end user
+
+<b>Signature:</b>
+
+```typescript
+warning?: string;
+```

examples/search_examples/public/search/app.tsx

@@ -131,12 +131,46 @@ export const SearchExamplesApp = ({
     setSelectedNumericField(fields?.length ? getNumeric(fields)[0] : null);
   }, [fields]);
 
-  const doAsyncSearch = async (strategy?: string, sessionId?: string) => {
+  const doAsyncSearch = async (
+    strategy?: string,
+    sessionId?: string,
+    addWarning: boolean = false,
+    addError: boolean = false
+  ) => {
     if (!indexPattern || !selectedNumericField) return;
 
     // Construct the query portion of the search request
     const query = data.query.getEsQuery(indexPattern);
 
+    if (addWarning) {
+      query.bool.must.push({
+        // @ts-ignore
+        error_query: {
+          indices: [
+            {
+              name: indexPattern.title,
+              error_type: 'warning',
+              message: 'Watch out!',
+            },
+          ],
+        },
+      });
+    }
+    if (addError) {
+      query.bool.must.push({
+        // @ts-ignore
+        error_query: {
+          indices: [
+            {
+              name: indexPattern.title,
+              error_type: 'exception',
+              message: 'Watch out!',
+            },
+          ],
+        },
+      });
+    }
+
     // Construct the aggregations portion of the search request by using the `data.search.aggs` service.
     const aggs = [{ type: 'avg', params: { field: selectedNumericField!.name } }];
     const aggsDsl = data.search.aggs.createAggConfigs(indexPattern, aggs).toDsl();
@@ -193,14 +227,23 @@ export const SearchExamplesApp = ({
               }
             );
             searchSubscription$.unsubscribe();
+            if (res.warning) {
+              notifications.toasts.addWarning({
+                title: 'Warning',
+                text: mountReactNode(res.warning),
+              });
+            }
           } else if (isErrorResponse(res)) {
             // TODO: Make response error status clearer
-            notifications.toasts.addWarning('An error has occurred');
+            notifications.toasts.addDanger('An error has occurred');
             searchSubscription$.unsubscribe();
           }
         },
-        error: () => {
-          notifications.toasts.addDanger('Failed to run search');
+        error: (e) => {
+          notifications.toasts.addDanger({
+            title: 'Failed to run search',
+            text: e.message,
+          });
         },
       });
   };
@@ -270,6 +313,14 @@ export const SearchExamplesApp = ({
     doAsyncSearch('myStrategy');
   };
 
+  const onWarningSearchClickHandler = () => {
+    doAsyncSearch(undefined, undefined, true);
+  };
+
+  const onErrorSearchClickHandler = () => {
+    doAsyncSearch(undefined, undefined, false, true);
+  };
+
   const onPartialResultsClickHandler = () => {
     setSelectedTab(1);
     const req = {
@@ -299,8 +350,11 @@ export const SearchExamplesApp = ({
             searchSubscription$.unsubscribe();
           }
         },
-        error: () => {
-          notifications.toasts.addDanger('Failed to run search');
+        error: (e) => {
+          notifications.toasts.addDanger({
+            title: 'Failed to run search',
+            text: e.message,
+          });
         },
       });
   };
@@ -530,6 +584,38 @@ export const SearchExamplesApp = ({
                 </EuiText>
               </EuiText>
               <EuiSpacer />
+              <EuiTitle size="xs">
+                <h3>Handling errors & warnings</h3>
+              </EuiTitle>
+              <EuiText>
+                When fetching data from Elasticsearch, there are several different ways warnings and
+                errors may be returned. In general, it is recommended to surface these in the UX.
+                <EuiSpacer />
+                <EuiButtonEmpty
+                  size="xs"
+                  onClick={onWarningSearchClickHandler}
+                  iconType="play"
+                  data-test-subj="searchWithWarning"
+                >
+                  <FormattedMessage
+                    id="searchExamples.searchWithWarningButtonText"
+                    defaultMessage="Request with a warning in response"
+                  />
+                </EuiButtonEmpty>
+                <EuiText />
+                <EuiButtonEmpty
+                  size="xs"
+                  onClick={onErrorSearchClickHandler}
+                  iconType="play"
+                  data-test-subj="searchWithError"
+                >
+                  <FormattedMessage
+                    id="searchExamples.searchWithErrorButtonText"
+                    defaultMessage="Request with an error in response"
+                  />
+                </EuiButtonEmpty>
+              </EuiText>
+              <EuiSpacer />
               <EuiTitle size="xs">
                 <h3>Handling partial results</h3>
               </EuiTitle>

src/plugins/data/common/search/types.ts

@@ -70,6 +70,11 @@ export interface IKibanaSearchResponse<RawResponse = any> {
    */
   isRestored?: boolean;
 
+  /**
+   * Optional warnings that should be surfaced to the end user
+   */
+  warning?: string;
+
   /**
    * The raw response returned by the internal search method (usually the raw ES response)
    */

src/plugins/data/public/public.api.md

@@ -1147,6 +1147,7 @@ export interface IKibanaSearchResponse<RawResponse = any> {
     loaded?: number;
     rawResponse: RawResponse;
     total?: number;
+    warning?: string;
 }
 
 // Warning: (ae-forgotten-export) The symbol "MetricAggType" needs to be exported by the entry point index.d.ts

src/plugins/data/public/search/fetch/handle_response.tsx

@@ -16,7 +16,18 @@ import { getNotifications } from '../../services';
 import { SearchRequest } from '..';
 
 export function handleResponse(request: SearchRequest, response: IKibanaSearchResponse) {
-  const { rawResponse } = response;
+  const { rawResponse, warning } = response;
+  if (warning) {
+    getNotifications().toasts.addWarning({
+      title: i18n.translate('data.search.searchSource.fetch.warningMessage', {
+        defaultMessage: 'Warning: {warning}',
+        values: {
+          warning,
+        },
+      }),
+    });
+  }
+
   if (rawResponse.timed_out) {
     getNotifications().toasts.addWarning({
       title: i18n.translate('data.search.searchSource.fetch.requestTimedOutNotificationMessage', {

src/plugins/data/server/search/strategies/ese_search/ese_search_strategy.ts

@@ -71,12 +71,14 @@ export const enhancedEsSearchStrategyProvider = (
       const promise = id
         ? client.asyncSearch.get({ ...params, id })
         : client.asyncSearch.submit(params);
-      const { body } = await shimAbortSignal(promise, options.abortSignal);
+      const { body, headers } = await shimAbortSignal(promise, options.abortSignal);
+
       const response = shimHitsTotal(body.response, options);
 
       return toAsyncKibanaSearchResponse(
         // @ts-expect-error @elastic/elasticsearch start_time_in_millis expected to be number
-        { ...body, response }
+        { ...body, response },
+        headers?.warning
       );
     };
 

src/plugins/data/server/search/strategies/ese_search/response_utils.ts

@@ -12,12 +12,13 @@ import { getTotalLoaded } from '../es_search';
 /**
  * Get the Kibana representation of an async search response (see `IKibanaSearchResponse`).
  */
-export function toAsyncKibanaSearchResponse(response: AsyncSearchResponse) {
+export function toAsyncKibanaSearchResponse(response: AsyncSearchResponse, warning?: string) {
   return {
     id: response.id,
     rawResponse: response.response,
     isPartial: response.is_partial,
     isRunning: response.is_running,
+    ...(warning ? { warning } : {}),
     ...getTotalLoaded(response.response),
   };
 }

x-pack/test/examples/search_examples/search_example.ts

@@ -5,6 +5,7 @@
  * 2.0.
  */
 
+import expect from '@kbn/expect';
 import { FtrProviderContext } from '../../functional/ftr_provider_context';
 
 // eslint-disable-next-line import/no-default-export
@@ -13,6 +14,7 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
   const PageObjects = getPageObjects(['common', 'timePicker']);
   const retry = getService('retry');
   const comboBox = getService('comboBox');
+  const toasts = getService('toasts');
 
   describe('Search session example', () => {
     const appId = 'searchExamples';
@@ -28,6 +30,13 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
       );
     });
 
+    beforeEach(async () => {
+      await toasts.dismissAllToasts();
+      await retry.waitFor('toasts gone', async () => {
+        return (await toasts.getToastCount()) === 0;
+      });
+    });
+
     it('should have an other bucket', async () => {
       await testSubjects.click('searchSourceWithOther');
       await testSubjects.click('responseTab');
@@ -53,5 +62,17 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
         return buckets.length === 2;
       });
     });
+
+    it('should handle warnings', async () => {
+      await testSubjects.click('searchWithWarning');
+      await retry.waitFor('', async () => {
+        const toastCount = await toasts.getToastCount();
+        return toastCount > 1;
+      });
+      const warningToast = await toasts.getToastElement(2);
+      const textEl = await warningToast.findByClassName('euiToastBody');
+      const text: string = await textEl.getVisibleText();
+      expect(text).to.contain('Watch out!');
+    });
   });
 }