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POPlupload fails to upload large files to AppEngine Blobstore
 

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  1. POPlupload fails to upload large files to AppEngine Blobstore
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    <p>I'm writing an application that uses AppEngine's Blobstore API to store files that the user uploads. On the client-side, I use Plupload. It works fine for files up to about 1.5 GB, but around 3 GB or so, upload requests mysteriously fail. A screenshot from the Dev Tools:</p> <p><img src="https://i.stack.imgur.com/v7Eys.png" alt="POST request to Blobstore has no response status; wasn&#39;t even sent"></p> <p>As you can see, the request fails completely, before it's even sent. Some of the things I noted:</p> <ol> <li>The upload shows some progress, usually 1, some intermediate number and then almost immediately, 100 (clearly impossible for such a large file)</li> <li>The "FileUploaded" Plupload event fires </li> </ol> <p>As an aside, I built a <a href="http://pluploadflash.appspot.com/" rel="nofollow noreferrer">stripped-down application</a>, that has only one page with Plupload and used that to upload files, it appears to work for > 3 GB files. Any ideas on how I can go about debugging this issue?</p> <p><strong>Update</strong></p> <p>I tried stepping through the upload. When the "UploadProgress" event triggers, the XHR object that Plupload contains, has a weird error:</p> <p><code>Error: InvalidStateError: DOM Exception 11</code></p> <p>Attached a series of screenshots showing this:</p> <p><strong><em>Breakpoint in the upload progress callback</em></strong> <img src="https://i.stack.imgur.com/nD0no.png" alt="Breakpoint in the upload progress callback"></p> <p><strong><em>XHR object has a error status</em></strong> <img src="https://i.stack.imgur.com/32hjD.png" alt="XHR object has a error status"></p> <p><strong><em>XHR statusText</em></strong> <img src="https://i.stack.imgur.com/TWAS5.png" alt="XHR statusText"></p>
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    1. USJay
    1. USJay
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    1. COWhat is the difference between stripped-down and not stripped-down Pluploads in your case?
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      1. USjayarjo
    2. COMaybe you should try Plupload 2b: http://plupload.com/punbb/viewtopic.php?id=2528
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      1. POPlupload fails to upload large files to AppEngine Blobstore
      1. USjayarjo
    3. CO@jayarjo The difference between stripped-down and not, is the stripped-down one has just two things: a web page with a Plupload uploader, and an Appengine app that has only 2 servlets: one to create an upload URL and one to handle an upload. The non-stripped-down application is a full-fledged web app that does many other things (file operations, previews etc). Is it possible that because the browser's memory consumption is less when running the stripped-down app, bigger files upload without problems? Whereas the full app already consumes lots of memory on its own, and therefore uploads fail?
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      1. USJay
 

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