[Bug]: Client Synchronization Timed Out And Failed

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Introduction

This article describes a bug in the Nextcloud Desktop Client where the client synchronization process times out and fails. The bug is reproducible on a fresh install of the client and is not related to any specific configuration or user action.

Bug Description

The bug is characterized by the client repeatedly scheduling a folder to sync, but the sync process fails due to a timeout. The client logs show a series of "Sync for folder '1' already scheduled, do not enqueue!" messages, followed by "Etag poll timer timeout" and "Can not run etag job: Sync is running" messages.

Steps to Reproduce

  1. Install the Nextcloud Desktop Client on a Windows 10 machine.
  2. Configure the client to sync a folder with the Nextcloud server.
  3. Observe the client logs to see the repeated scheduling of the folder to sync and the subsequent timeout and failure.

Expected Behavior

The client should successfully sync the folder with the Nextcloud server without any timeouts or failures.

Which Files Are Affected by This Bug

The bug is related to the folderman.cpp file in the client's source code.

Operating System

The bug is reproducible on Windows 10.

Package

The bug is present in the official Windows MSI package.

Nextcloud Server Version

The bug is present in Nextcloud Server version 31.0.0.

Nextcloud Desktop Client Version

The bug is present in Nextcloud Desktop Client version 3.16.0.

Is This Bug Present After an Update or on a Fresh Install?

The bug is present on a fresh install of the client.

Are You Using the Nextcloud Server Encryption Module?

Encryption is disabled.

Are You Using an External User-Backend?

The default internal user-backend is used.

Nextcloud Server Logs

The Nextcloud server logs show a series of errors related to the client's synchronization process, including a "Could not decrypt or decode encrypted session data" error.

Additional Info

No additional information is available.

Conclusion

The bug in the Nextcloud Desktop Client causes the client synchronization process to time out and fail. The bug is reproducible on a fresh install of the client and is not related to any specific configuration or user action. The bug is related to the folderman.cpp file in the client's source code and is present in Nextcloud Server version 31.0.0 and Nextcloud Desktop Client version 3.16.0.

Possible Solutions

  1. Update the Client: Update the Nextcloud Desktop Client to the latest version to see if the issue is resolved.
  2. Check the Server Logs: Check the Nextcloud server logs for any errors or issues that may be related to the client's synchronization process.
  3. Disable Encryption: Disable encryption on the Nextcloud server to see if the issue is resolved.
  4. Use a Different User-Backend: Try using a different user-backend, such as LDAP or SSO, to see if the issue is resolved.
  5. Contact Nextcloud Support: Contact Nextcloud support for further assistance and guidance.

Additional Information

  • Client Version: 3.16.0
  • Server Version: 31.0.0
  • Operating System: Windows 10
  • Package: Official Windows MSI
  • Encryption: Disabled
  • User-Backend: Default internal user-backend

Related Issues

Q: What is the bug in the Nextcloud Desktop Client?

A: The bug causes the client synchronization process to time out and fail. The client repeatedly schedules a folder to sync, but the sync process fails due to a timeout.

Q: What are the symptoms of the bug?

A: The symptoms of the bug include:

  • The client repeatedly scheduling a folder to sync
  • The sync process failing due to a timeout
  • "Sync for folder '1' already scheduled, do not enqueue!" messages in the client logs
  • "Etag poll timer timeout" and "Can not run etag job: Sync is running" messages in the client logs

Q: What are the possible causes of the bug?

A: The possible causes of the bug include:

  • A configuration issue with the client or server
  • A problem with the client's synchronization process
  • A issue with the server's encryption module
  • A problem with the user-backend being used

Q: How can I troubleshoot the bug?

A: To troubleshoot the bug, you can try the following:

  • Check the client logs for any errors or issues
  • Check the server logs for any errors or issues
  • Try updating the client to the latest version
  • Try disabling encryption on the server
  • Try using a different user-backend

Q: How can I fix the bug?

A: To fix the bug, you can try the following:

  • Update the client to the latest version
  • Check the server logs for any errors or issues
  • Try disabling encryption on the server
  • Try using a different user-backend
  • Contact Nextcloud support for further assistance and guidance

Q: Is the bug present in all versions of the client?

A: The bug is present in Nextcloud Desktop Client version 3.16.0. It is not clear if the bug is present in other versions of the client.

Q: Is the bug present in all operating systems?

A: The bug is present in Windows 10. It is not clear if the bug is present in other operating systems.

Q: Can I use a different user-backend to fix the bug?

A: Yes, you can try using a different user-backend to fix the bug. However, it is not clear if this will resolve the issue.

Q: Can I contact Nextcloud support for further assistance and guidance?

A: Yes, you can contact Nextcloud support for further assistance and guidance.

Related Questions

Additional Information

  • Client Version: 3.16.0
  • Server Version: 31.0.0
  • Operating System: Windows 10
  • Package: Official Windows MSI
  • Encryption: Disabled
  • User-Backend: Default internal user-backend