Question

我的node.js启动功能每隔一段时间都会失败 - 没有失败。它在AWS Lambda中托管，用于Alexa技能。当它工作时，Alexa完美地说出了我的查询结果。另一半时间，她说遇到了错误。

这是我与之合作的内容。这只是我对node.js的第二个项目，因此非常感谢示例代码。

var mysql      = require('mysql');
var pool = mysql.createConnection({
  connectionLimit : 10,
  host     : 'my host',
  user     : 'test',
  password : 'test',
  database: 'test',
});


const handlers = {

   'LaunchRequest': function () {

pool.query('SELECT versetext, book, reference  FROM myverses ORDER BY RAND() LIMIT 1', 
function (error, results, fields) {
   // handle if error or no result...
   console.log(JSON.stringify(results[0].versetext));
   var scripture = JSON.stringify(results[0].versetext).replace(/['"]+/g, '');
   var book = JSON.stringify(results[0].book).replace(/['"]+/g, '');
   var reference = JSON.stringify(results[0].reference).replace(/['"]+/g, '');
   this.emit(':tell', scripture + " " + "<say-as interpret-as='ordinal'>" + book + "</say-as>" + " " + reference);

 }.bind(this));

pool.end();

    },


    'AMAZON.HelpIntent': function () {
        const speechOutput = this.t('HELP_MESSAGE');
        const reprompt = this.t('HELP_MESSAGE');
        this.emit(':ask', speechOutput, reprompt);
    },
    'AMAZON.CancelIntent': function () {
        this.emit(':tell', this.t('STOP_MESSAGE'));
    },
    'AMAZON.StopIntent': function () {
        this.emit(':tell', this.t('STOP_MESSAGE'));
    },

      'Unhandled': function () {
        this.emit(':tell', "Sorry, pal.");

    },

};

exports.handler = function (event, context) {
    const alexa = Alexa.handler(event, context);
    alexa.appId = APP_ID;
    // To enable string internationalization (i18n) features, set a resources object.
    alexa.registerHandlers(handlers);
    alexa.execute();
};

这是我每隔一段时间得到的错误日志。这似乎标志着我对results[0]的使用，但我不确定原因。

   {
  "errorMessage": "RequestId: 679ead1f-0d5a-11e8-a5b3-fd55e0ced610 Process exited before completing request"
}

Request ID:
"679ead1f-0d5a-11e8-a5b3-fd55e0ced610"

Function Logs:
START RequestId: 679ead1f-0d5a-11e8-a5b3-fd55e0ced610 Version: $LATEST
2018-02-09T05:30:57.207Z    679ead1f-0d5a-11e8-a5b3-fd55e0ced610    TypeError: Cannot read property '0' of undefined
    at Object.<anonymous> (/var/task/index.js:35:38)
    at Query.Sequence.end (/var/task/node_modules/mysql/lib/protocol/sequences/Sequence.js:88:24)
    at /var/task/node_modules/mysql/lib/protocol/Protocol.js:225:14
    at _combinedTickCallback (internal/process/next_tick.js:73:7)
    at process._tickDomainCallback (internal/process/next_tick.js:128:9)
END RequestId: 679ead1f-0d5a-11e8-a5b3-fd55e0ced610
REPORT RequestId: 679ead1f-0d5a-11e8-a5b3-fd55e0ced610  Duration: 83.15 ms  Billed Duration: 100 ms     Memory Size: 128 MB Max Memory Used: 45 MB  
RequestId: 679ead1f-0d5a-11e8-a5b3-fd55e0ced610 Process exited before completing request

Answer 1

事实证明问题就像完全删除pool.end();行一样简单。

Node.JS函数每隔一段时间都会失败

1 个答案: