make stream wait

packages/app/src/server/service/page.js

@@ -3,6 +3,7 @@ import loggerFactory from '~/utils/logger';
 
 const mongoose = require('mongoose');
 const escapeStringRegexp = require('escape-string-regexp');
+const streamToPromise = require('stream-to-promise');
 
 const logger = loggerFactory('growi:models:page');
 const debug = require('debug')('growi:models:page');
@@ -190,6 +191,8 @@ class PageService {
     readStream
       .pipe(createBatchStream(BULK_REINDEX_SIZE))
       .pipe(writeStream);
+
+    await streamToPromise(readStream);
   }