질문입니다.

MongooseError: Operation `users.findOne()` buffering timed out after 10000ms [0] at Timeout.setTimeout (/home/lhg78910/shoppingmall/node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js:197:23) [0] at ontimeout (timers.js:436:11) [0] at tryOnTimeout (timers.js:300:5) [0] at listOnTimeout (timers.js:263:5) [0] at Timer.processTimers (timers.js:223:10) [0] Emitted 'error' event at: [0] at immediate (/home/lhg78910/shoppingmall/node_modules/mongoose/lib/model.js:5067:15) [0] at process._tickCallback (internal/process/next_tick.js:61:11) 이러한 에러도 있습니다...