Catch role cache clear rejection on role deletion

Author: AdrianCurtin

src/rest.js

@@ -15,6 +15,7 @@ var triggers = require('./triggers');
 const Auth = require('./Auth');
 const { enforceRoleSecurity } = require('./SharedRest');
 const { createSanitizedError } = require('./Error');
+const logger = require('./logger').logger;
 
 function checkTriggers(className, config, types) {
   return types.some(triggerType => {
@@ -248,7 +249,12 @@ function del(config, auth, className, objectId, context) {
       // of its children, and the whole role cache is cleared rather than one
       // user's entry.
       if (className === '_Role') {
-        config.cacheController.role.clear();
+        // Issued without being awaited so a cache outage cannot fail a delete
+        // that already committed, but the rejection is caught so it does not
+        // surface as an unhandled rejection.
+        config.cacheController.role
+          .clear()
+          .catch(e => logger.error('Could not clear role cache after role deletion', { error: e }));
         if (config.liveQueryController) {
           config.liveQueryController.clearCachedRoles(auth.user);
         }