javascript - Error: Unknown action from worker: ReaderHeadersReady when loading a PDF using PDF.js - Stack Overflow

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This code was working perfectly fine yesterday but this morning I am getting this error

pdf.js:276 Uncaught Error: Unknown action from worker: ReaderHeadersReady
    at error (pdf.js:276)
    at MessageHandler.messageHandlerComObjOnMessage (pdf.js:1565)
    at MessageHandler.messageHandlerComObjOnMessage (pdf.js:1565)

pdf.js:276 Uncaught Error: Unknown action from worker: GetReader
    at error (pdf.js:276)
    at MessageHandler.messageHandlerComObjOnMessage (pdf.js:1565)

Code

  function render(file) {
        PDFJS.getDocument(file.path).then(function (pdf) {
            pdfDoc = pdf;
            totalPages = pdf.numPages;
            renderPage(pageNumber)
        }).catch(function (reason) {
            console.error(reason);
        });
    }

and i am using the worker from

PDFJS.workerSrc = '//mozilla.github.io/pdf.js/build/pdf.worker.js';

The version of pdf.js i am using is 1.7.225 which currently is the lastest stable version.

Does anyone know what is cause this error?

This code was working perfectly fine yesterday but this morning I am getting this error

pdf.js:276 Uncaught Error: Unknown action from worker: ReaderHeadersReady
    at error (pdf.js:276)
    at MessageHandler.messageHandlerComObjOnMessage (pdf.js:1565)
    at MessageHandler.messageHandlerComObjOnMessage (pdf.js:1565)

pdf.js:276 Uncaught Error: Unknown action from worker: GetReader
    at error (pdf.js:276)
    at MessageHandler.messageHandlerComObjOnMessage (pdf.js:1565)

Code

  function render(file) {
        PDFJS.getDocument(file.path).then(function (pdf) {
            pdfDoc = pdf;
            totalPages = pdf.numPages;
            renderPage(pageNumber)
        }).catch(function (reason) {
            console.error(reason);
        });
    }

and i am using the worker from

PDFJS.workerSrc = '//mozilla.github.io/pdf.js/build/pdf.worker.js';

The version of pdf.js i am using is 1.7.225 which currently is the lastest stable version.

Does anyone know what is cause this error?

• javascript
• pdf.js

Share Improve this question Follow asked Jul 28, 2017 at 0:45 ArdenexalArdenexal 55377 silver badges2020 bronze badges 3

• Are you mixing versions of pdf.js and pdf.worker.js files? – async5 Commented Jul 28, 2017 at 12:55
• mozilla.github.io/pdf.js/build/pdf.worker.js is not a stable 1.7.225 – async5 Commented Jul 28, 2017 at 12:56
• Any news on this? I am having the vary same issue starting from exactly the same day – Héctor Paúl Cervera-García Commented Jul 31, 2017 at 6:16

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 9

Use specific version of the worker

PDFJS.workerSrc = 'https://npmcdn./[email protected]/build/pdf.worker.js';

I had the same issue (but locked at version 1.8.524) and solved it by upgrading to the latest version at the date: 1.8.593

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