AWS Lambda函数在完成请求之前退出
我正在尝试遵循S3和Lambda的AWS指南
http://docs.aws.amazon.com/lambda/latest/dg/with-s3-example.html
我在手动testing阶段，但是当我尝试运行testing时，我得到“errorMessage”：“在完成请求之前退出进程”。
在日志中，失败点与async.waterfall代码有关。
当我运行Lambda函数时，它会得到我的示例图像，resize并将其放入新的S3存储桶。 然后它看起来像asynchronous试图find一个未定义的“nextTask”运行。 我从来没有使用过asynchronous，所以我不知道如何解决这个问题。
cloudwatch日志文件给了我这个
2016-09-16T18:36:44.011Z 836d0280-7c3c-11e6-933a-9b5b3a5e8dd8 TypeError: undefined is not a function at /var/task/ResizeImages.js:98:13 at /var/task/node_modules/async/dist/async.js:486:20 at nextTask (/var/task/node_modules/async/dist/async.js:5008:33) at Response.<anonymous> (/var/task/node_modules/async/dist/async.js:5015:17) at Response.<anonymous> (/var/task/node_modules/async/dist/async.js:339:31) at Response.<anonymous> (/var/task/node_modules/async/dist/async.js:847:20) at Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:355:18) at Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:105:20) at Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:77:10) at Request.emit (/var/runtime/node_modules/aws-sdk/lib/request.js:615:14) 要安装asynchronous（和imageMagik），我只是使用该命令
npm install async gm
在我的node_modules文件夹里面。
我使用的示例节点脚本是在这里，第98行被评论。
// dependencies var async = require('async'); var AWS = require('aws-sdk'); var gm = require('gm') .subClass({ imageMagick: true }); // Enable ImageMagick integration. var util = require('util'); // constants var MAX_WIDTH = 100; var MAX_HEIGHT = 100; // get reference to S3 client var s3 = new AWS.S3(); exports.handler = function(event, context, callback) { // Read options from the event. console.log("Reading options from event:\n", util.inspect(event, {depth: 5})); var srcBucket = event.Records[0].s3.bucket.name; // Object key may have spaces or unicode non-ASCII characters. var srcKey = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, " ")); var dstBucket = srcBucket + "-resized"; var dstKey = "thumb-" + srcKey; // Sanity check: validate that source and destination are different buckets. if (srcBucket == dstBucket) { callback("Source and destination buckets are the same."); return; } // Infer the image type. var typeMatch = srcKey.match(/\.([^.]*)$/); if (!typeMatch) { callback("Could not determine the image type."); return; } var imageType = typeMatch[1]; if (imageType != "jpg" && imageType != "png") { callback('Unsupported image type: ${imageType}'); return; } // Download the image from S3, transform, and upload to a different S3 bucket. async.waterfall([ function download(next) { // Download the image from S3 into a buffer. s3.getObject({ Bucket: srcBucket, Key: srcKey }, next); }, function transform(response, next) { gm(response.Body).size(function(err, size) { // Infer the scaling factor to avoid stretching the image unnaturally. var scalingFactor = Math.min( MAX_WIDTH / size.width, MAX_HEIGHT / size.height ); var width = scalingFactor * size.width; var height = scalingFactor * size.height; // Transform the image buffer in memory. this.resize(width, height) .toBuffer(imageType, function(err, buffer) { if (err) { next(err); } else { next(null, response.ContentType, buffer); } }); }); }, function upload(contentType, data, next) { // Stream the transformed image to a different S3 bucket. s3.putObject({ Bucket: dstBucket, Key: dstKey, Body: data, ContentType: contentType }, next); } ], function (err) { if (err) { console.error( 'Unable to resize ' + srcBucket + '/' + srcKey + ' and upload to ' + dstBucket + '/' + dstKey + ' due to an error: ' + err ); } else { console.log( 'Successfully resized ' + srcBucket + '/' + srcKey + ' and uploaded to ' + dstBucket + '/' + dstKey ); } callback(null, "message"); } // ------- LINE 98 ----------- ); };
发布可视性答案。
运行时设置为nodejs而不是node4.3