Issue on running Node.js server

Question

I got the following error when i run the server im new to Node.js i dont know about "Cannot read property 'length' of undefined" and following issues.

MySQL Failure.
{ [Error: connect ETIMEDOUT 211.189.127.226:3306]
code: 'ETIMEDOUT',
errno: 'ETIMEDOUT',
syscall: 'connect',
address: '211.189.127.226',
port: 3306,
fatal: true }
TypeError: /home/ubuntu/workspace/Node.JS Server/Streaming/views/page/index.ejs:62
60|                     <div id="tabs-1">
61|                         <table class="broadcast_list_table">
>> 62| <%
63|                             for(var i=0; i<=(room.length/5); i++) {
64| %>
65|                                 <tr>

 Cannot read property 'length' of undefined
at eval (eval at <anonymous> (/home/ubuntu/workspace/Node.JS Server/Streaming/node_modules/ejs/lib/ejs.js:236:14), <anonymous>:48:50)
at eval (eval at <anonymous> (/home/ubuntu/workspace/Node.JS Server/Streaming/node_modules/ejs/lib/ejs.js:236:14), <anonymous>:87:73)
at exports.compile (/home/ubuntu/workspace/Node.JS Server/Streaming/node_modules/ejs/lib/ejs.js:249:15)
at Object.exports.render (/home/ubuntu/workspace/Node.JS Server/Streaming/node_modules/ejs/lib/ejs.js:287:13)
at View.exports.renderFile [as engine] (/home/ubuntu/workspace/Node.JS Server/Streaming/node_modules/ejs/lib/ejs.js:317:20)
at View.render (/home/ubuntu/workspace/Node.JS Server/Streaming/node_modules/express/lib/view.js:76:8)
at Function.app.render (/home/ubuntu/workspace/Node.JS Server/Streaming/node_modules/express/lib/application.js:505:10)
at ServerResponse.res.render (/home/ubuntu/workspace/Node.JS Server/Streaming/node_modules/express/lib/response.js:756:7)
at Query._callback (/home/ubuntu/workspace/Node.JS Server/Streaming/routes/index.js:42:17)
at Query.Sequence.end (/home/ubuntu/workspace/Node.JS Server/Streaming/node_modules/mysql/lib/protocol/sequences/Sequence.js:66:24)
GET / 500 127413ms
GET / 500 125181ms`

The exception explains what is wrong. You do not have variable room defined. — Mirek Surma, Dec 11 '15 at 10:24
i define the variable room as a global variable but still i got the same error — Karthi Keyan, Dec 11 '15 at 10:39
Possible duplicate of [Detecting an undefined object property](http://stackoverflow.com/questions/27509/detecting-an-undefined-object-property) — Bonatti, Dec 11 '15 at 11:16

score 0 · Answer 1 · edited Dec 11 '15 at 12:28

0

Possibility of error is below.

room object is undefined, so its become undefined.length. To resolve it make sure room object should not be undefined wherever you have defined that object.
Try to use Object.keys(room).length . This would return the length of object

edited Dec 11 '15 at 12:28

almcd

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answered Dec 11 '15 at 12:02

Swarndeep Poddar

1

Issue on running Node.js server

1 Answers1