Mongoose：拓扑被破坏 MongoError

Question

https://github.com/keystonejs/keystone 的我们一直在我们的 e2e 测试服务器中执行以下操作，现在在 e2e 开始之前删除数据库一段时间没有问题：

mongoose.connect(mongoUri,function(err){ if (!err) { mongoose.connection.db.dropDatabase(function (err) { mongoose.connection.close(function(err) { done(err); }) }); } else { done(err); } });

但最近（Mongoose 4.5.9）我们现在在启动时收到以下错误。有任何想法吗？我们是否需要根据最近的一些更新来调整上述 drop db 逻辑？

10:00:20:493 e2e: dropping test database Mongoose model 'index-single-done' event fired on 'Boolean' for index: { key: 1 } With error: topology was destroyed MongoError: topology was destroyed at Server.insert (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb-core\lib\topologies\server.js:1312:49) at Server.insert (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\server.js:351:17) at C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\db.js:1018:21 at handleCallback (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\utils.js:96:12) at C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\db.js:1697:20 at handleCallback (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\utils.js:96:12) at C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\db.js:306:20 at commandCallback (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb-core\lib\topologies\server.js:1182:20) at Callbacks.flush (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb-core\lib\topologies\server.js:88:7) at Server.destroy (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb-core\lib\topologies\server.js:1075:41) at Server.close (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\server.js:398:17) at Db.close (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\db.js:357:19) at NativeConnection.doClose (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongoose\lib\drivers\node-mongodb-native\connection.js:233:11) at NativeConnection.Connection._close (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongoose\lib\connection.js:570:12) at C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongoose\lib\connection.js:541:11 at lib$es6$promise$$internal$$initializePromise (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\es6-promise\dist\es6-promise.js:409:9) Mongoose model 'index' event fired on 'Boolean' with error: topology was destroyed MongoError: topology was destroyed at Server.insert (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb-core\lib\topologies\server.js:1312:49) at Server.insert (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\server.js:351:17) at C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\db.js:1018:21 at handleCallback (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\utils.js:96:12) at C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\db.js:1697:20 at handleCallback (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\utils.js:96:12) at C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\db.js:306:20 at commandCallback (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb-core\lib\topologies\server.js:1182:20) at Callbacks.flush (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb-core\lib\topologies\server.js:88:7) at Server.destroy (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb-core\lib\topologies\server.js:1075:41) at Server.close (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\server.js:398:17) at Db.close (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb\lib\db.js:357:19) at NativeConnection.doClose (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongoose\lib\drivers\node-mongodb-native\connection.js:233:11) at NativeConnection.Connection._close (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongoose\lib\connection.js:570:12) at C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongoose\lib\connection.js:541:11 at lib$es6$promise$$internal$$initializePromise (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\es6-promise\dist\es6-promise.js:409:9) Mongoose model 'index-single-done' event fired on 'CloudinaryImage' for index: { key: 1 } With error: topology was destroyed MongoError: topology was destroyed at Server.insert (C:\Users\Carlos\git\prs\keystonejs\master\node_modules\keystone\node_modules\mongodb-core\lib\topologies\server.js:1312:49) ...

Answer 1

这原来是一个逻辑错误！奇怪的逻辑是初始化猫鼬模式模型，然后删除数据库，然后关闭数据库，然后对数据库进行正常操作。无论出于何种原因，这工作了很长时间，没有任何错误。在遇到导致上述错误的同步问题之前，某些东西的性能可能会变得更快。