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POnodejs stops responding after 1 call to S3/SQS
 

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  1. POnodejs stops responding after 1 call to S3/SQS
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    <p>I am performing a simple process in nodejs/expressjs using the aws-sdk module: </p> <ol> <li>upload file (using browser form post) </li> <li>send it to AWS S3 </li> <li>put a message in AWS SQS for further processing. </li> <li>respond to the client with the SQS return object. </li> </ol> <p>The code below works perfectly, but only one time. After the first post of a file, the node app no longer responds to other posts or actions (it even stops any process I have running with SetInterval(method,10000). When I try to post a second file, it just hangs. If I restart the server it works fine for just one post. I am running nodejs-v0.10.9 inside WebStorm 5 IDE. The code that the client is routed to after the file is posted is below - queueXml:</p> <pre><code>var fs = require('fs'); var step = require('step'); var AWS = require('aws-sdk'); AWS.config.loadFromPath('./lib/aws/config.json'); var bucketName = 'xxxxxx'; var sqsEndPoint = 'http://xxxx'; exports.queueXml = function(req,res){ var key = getGuid(); step( function readPostedFile(){ fs.readFile(req.files.postedfile.path, this); }, function sendToS3(err, data){ if(err) throw err; var s3Bucket = new AWS.S3({params:{Bucket: bucketName}}); var fileData = {Bucket: bucketName, Key: key, Body: data}; s3Bucket.putObject(fileData,this); }, function sendSQSMessage(err, path){ if(err) throw err; var sqs = new AWS.SQS(); var message = {Bucket:bucketName, Key:key}; sqs.sendMessage({QueueUrl:sqsEndPoint,MessageBody:JSON.stringify(message)},this); }, function end(err, data){ if(err) throw err; res.send(JSON.stringify(data)); } ) } </code></pre>
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    1. PTQuestion
    1. USMarcel Gwerder
    1. USuser2694445
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      1. VTUpMod
    1. COWhy are you passing "this" as the callback to fs.readFile(). What "this" is is hard to determine sometimes. What is it in this case?
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      1. USChrisCM
    2. COSorry - I am using Step so "this" is calling the next function as a callback passing err and data. In this case "this" is calling function sendToS3. Likewise, "this" in sendToS3 is calling sendSQSMessage. sendSQSMessage is calling end.
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      1. POnodejs stops responding after 1 call to S3/SQS
      1. USuser2694445
    3. COHave you tried stepping through the code using Node-inspector and seeing what happens the second time?
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      1. USCharlie Key
 

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