set timeout for timelion search requests (#19711)

* set timeout for timelion search requests

* stub out server.config for mocha testing

* test timeout set

* arrow functions

src/core_plugins/timelion/server/series_functions/__tests__/es.js

@@ -181,6 +181,13 @@ describe(filename, () => {
       expect(request.index).to.equal('beer');
     });
 
+    it('sets the timeout on the request', () => {
+      config.index = 'beer';
+      const request = fn(config, tlConfig, emptyScriptedFields);
+
+      expect(request.timeout).to.equal('30000ms');
+    });
+
     it('always sets body.size to 0', () => {
       const request = fn(config, tlConfig, emptyScriptedFields);
 

src/core_plugins/timelion/server/series_functions/__tests__/fixtures/tlConfig.js

@@ -40,6 +40,18 @@ export default function () {
           }
         })
       }
+    },
+    config: () => {
+      return {
+        get: (key) => {
+          switch (key) {
+            case 'elasticsearch.shardTimeout':
+              return 30000;
+            default:
+              throw new Error(`unexpected config ${key}`);
+          }
+        }
+      };
     }
   };
 

src/core_plugins/timelion/server/series_functions/es/lib/build_request.js

@@ -66,9 +66,9 @@ export default function buildRequest(config, tlConfig, scriptedFields) {
 
   _.assign(aggCursor, createDateAgg(config, tlConfig, scriptedFields));
 
-
   return {
     index: config.index,
+    timeout: tlConfig.server.config().get('elasticsearch.shardTimeout') + 'ms',
     body: {
       query: {
         bool: bool