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Copying empty (zero-length) block blob with `syncCopyFromUrl` fails with `CannotVerifyCopySource` error

See original GitHub issue

Package Name: @azure/storage-blob
Package Version: 12.0.1
Operating system: linux
nodejs
- version: 12.13.1
browser
- name/version:
typescript
- version: 3.6.4
Is the bug related to documentation in
- README.md
- source code documentation
- SDK API docs on https://docs.microsoft.com

Describe the bug Copying an empty file (zero-length) from url to a block blob with syncCopyFromUrl fails with CannotVerifyCopySource error. The source file is also a block blob, at the same storage account and container.

To Reproduce Steps to reproduce the behavior:

Try to copy an empty blob with syncCopyFromUrl

Expected behavior Empty blob is copied, with zero-length, just as a file with content is.

Screenshots

Additional context Code from library I’m writing, I hid away most of the set-up code.


        const srcBlobClient = this.blockBlobClient(srcPath);
        const destBlobClient = this.blockBlobClient(destPath);

        const sourceUrl = await this.getSignedUrl(srcPath);

        await destBlobClient.syncCopyFromURL(
                    sourceUrl.signedUrl,
                ),

Error code: CannotVerifyCopySource
Original stack:
Error: <?xml version="1.0" encoding="utf-8"?><Error><Code>CannotVerifyCopySource</Code><Message>The specified blob does not exist.
RequestId:55009a2d-e01e-005f-4d42-b4d1fd000000
Time:2019-12-16T18:53:59.5491128Z</Message></Error>
    at new RestError (/home/krzysztofchrapka/dev/flydrive/node_modules/@azure/core-http/lib/restError.ts:23:5)
    at /home/krzysztofchrapka/dev/flydrive/node_modules/@azure/core-http/lib/policies/deserializationPolicy.ts:168:27
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at AzureBlockBlobStorage.convertError (/home/krzysztofchrapka/dev/flydrive/src/Drivers/AzureBlockBlobStorage.ts:255:16)
    at AzureBlockBlobStorage.copy (/home/krzysztofchrapka/dev/flydrive/src/Drivers/AzureBlockBlobStorage.ts:66:24)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)

Issue Analytics

State:
Created 4 years ago
Comments:14 (2 by maintainers)

Top GitHub Comments

1reaction

gmantricommented, Jun 18, 2020

@saralpa Please share the complete code. Make sure to omit any sensitive information.

0reactions

andresreibelcommented, Oct 22, 2021

https://gist.github.com/OJezu/6248584c52f9a2095576d24b3f4bed94 if the content is empty, then this will be empty => await sourceBlobClient.upload(content, content.byteLength);
if use syncCopyFromUrl and the blob is archived, then you get an error: ‘Copy source blob has been modified.’
if you use beginCopyFromUrl and the blob is archived, then you get an error: ‘This operation is not permitted on an archived blob.’

=> I think you cannot copy blobs that have access tier equal to ‘Archive’. You need to use the REST API

Any news?

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