在linux evniroment中部署一个节点js项目一切都很顺利，但是在12到24小时之后抛出这个错误和应用程序是不行的？
Error: This socket has been ended by the other party
at Socket.writeAfterFIN [as write] (net.js:275:12)
at Protocol.<anonymous> (/opt/node/node_modules/mysql/lib/Connection.js:69:27)
at Protocol.EventEmitter.emit (events.js:95:17)
at Protocol._emitPacket (/opt/node/node_modules/mysql/lib/protocol/Protocol.js:208:8)
at Query.<anonymous> (/opt/node/node_modules/mysql/lib/protocol/Protocol.js:121:12)
at Query.EventEmitter.emit (events.js:95:17)
at Query.start (/opt/node/node_modules/mysql/lib/protocol/sequences/Query.js:29:8)
at Protocol._startSequence (/opt/node/node_modules/mysql/lib/protocol/Protocol.js:262:14)
at Protocol._enqueue (/opt/node/node_modules/mysql/lib/protocol/Protocol.js:134:10)
at Connection.query (/opt/node/node_modules/mysql/lib/Connection.js:165:25)
--------------------
at Protocol._enqueue (/opt/node/node_modules/mysql/lib/protocol/Protocol.js:110:48)
at Connection.query (/opt/node/node_modules/mysql/lib/Connection.js:165:25)
at Object.query (/opt/node/api/database.js:78:16)
at Object.Wait.applyAndWait (/opt/node/node_modules/wait.for/waitfor.js:45:12)
at Object.Wait [as for] (/opt/node/node_modules/wait.for/waitfor.js:61:21)
at exports.getStories (/opt/node/api/stories.js:37:23)
at /opt/node/node_modules/wait.for/waitfor.js:15:31
Error: No default engine was specified and no extension was provided.
at new View (/opt/node/node_modules/express/lib/view.js:41:42)
at Function.app.render (/opt/node/node_modules/express/lib/application.js:486:12)
at ServerResponse.res.render (/opt/node/node_modules/express/lib/response.js:798:7)
at Object.errorHandler [as handle] (/opt/node/app.js:29:7)
at next (/opt/node/node_modules/express/node_modules/connect/lib/proto.js:188:17)
at Object.clientErrorHandler [as handle] (/opt/node/app.js:23:5)
at next (/opt/node/node_modules/express/node_modules/connect/lib/proto.js:188:17)
at Object.logErrors [as handle] (/opt/node/app.js:16:3)
at next (/opt/node/node_modules/express/node_modules/connect/lib/proto.js:188:17)
at next (/opt/node/node_modules/e
xpress/node_modules/connect/lib/proto.js:190:11
不知道我哪里错了
提前致谢