Datto Windows Agent: CURL Error 400, a Backup Is Currently in Progress

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Issue

When you try to start a backup for a system protected by the Datto Windows Agent, you receive the error, "A backup is already in progress."

This is the actual error message:

CRITICAL BACKUP FAILURE: ABA1009 CURL ERROR: HTTPS://x.x.x.x:25568/BACKUP: HTTP CODE: 400 (BAD REQUEST) RESPONSE: 'A BACKUP IS CURRENTLY IN PROGRESS.' – BACKUP ATTEMPT 2 OF 2

Environment

  • Datto Windows Agent

Cause

This error occurs when the server thinks a backup is currently underway, thus preventing a new backup from starting. When it occurs, you can see the issue in the agent logs.

Resolution

Viewing the agent logs in the device UI

1. Click protect, and then click Show Backup Logs for the appropriate agent. 

Figure 1: Select Show Backup Logs

 2. select Show Agent Logs from the expanded page.

Figure 2: Show Agent Logs

3. You will see output similar to the following:

Thu 10/08/17 9:57:08 am - Backup failed. Informing writers of unsuccessful
backup.
Thu 10/08/17 9:57:08 am - Backup exception: Could not setup volume snapshot
set.
Thu 10/08/17 9:57:08 am - Query snapshots: 0 existing snapshots.
Thu 10/08/17 9:57:08 am - Snapshot failed. Error: 21 - Could not datto
configure snapshot set.
Thu 10/08/17 9:57:03 am - Snapshot - Type: VSS
Thu 10/08/17 9:57:03 am - Query snapshots: 0 existing snapshots.
Thu 10/08/17 9:56:55 am - A backup is currently in progress.
Thu 10/08/17 9:56:53 am - A backup is currently in progress.
Thu 10/08/17 9:55:23 am - Command run exited with code. 0
Thu 10/08/17 9:48:25 am - A backup is currently in progress.
Thu 10/08/17 9:48:23 am - A backup is currently in progress.
Thu 10/08/17 9:48:00 am - A backup is currently in progress.
Thu 10/08/17 9:47:57 am - A backup is currently in progress.
Thu 10/08/17 9:44:08 am - A backup is currently in progress.
Thu 10/08/17 9:44:06 am - A backup is currently in progress.

Solution

1. Open a run window on the protected machine and go to services.

2. Right click on Datto Backup Agent Service and select restart.

3. Right click on Datto Provider and select restart.

Figure 3: Restart services

If the issue continues, stop the services above. In File Explorer, browse to C:\Windows\system32\config\systemprofile\AppData\Local\Datto\Datto Windows Agent\agent.sqlite
and rename the .sqlite file to agent.sqlite.old, then restart the services and attempt a backup. 

If you have attempted all of the above-listed troubleshooting steps, but you are still unable to perform a backup, contact Datto Technical Support for assistance.


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