Troubleshooting › Virtual Machine Backup and Restore Related › Failed to Create a Snapshot for Hyper-V Virtual Machines When Multiple Jobs are Running

Failed to Create a Snapshot for Hyper-V Virtual Machines When Multiple Jobs are Running

Symptom

When running multiple jobs, the snapshot creation for Hyper-V CSV virtual machine takes too much time and then fails. It fails even after multiple tries. The following message is displayed in the activity log of the respective virtual machine.

The creation of snapshot is in progress, and only one snapshot creation operation can be in progress at one time. 

Retry after 600 seconds.

Solution

This may happen because you can only run one snapshot creation at a time.

To solve the issue, you can either increase the number of tries or increase the retry time interval. You can also increase the number of concurrent jobs that you can run.

Note: The default retry value is 3 and the default time interval value is 10 minutes.

To increase the number of retry, perform the following steps on the cluster nodes:

1. Open the Windows registry.
2. Navigate to HKLM\SOFTWARE\Arcserve\Unified Data Protection\Engine.
3. Create a key named as VSSWrap.
4. Right-click VSSWrap, select New, and then select DWORD (32-bit) value and specify the name as VssAsynchMaxRetryTimes.
5. Specify the value as required.

To increase the time interval between each retry, perform the following steps on the cluster nodes:

1. Open the Windows registry.
2. Navigate to HKLM\SOFTWARE\Arcserve\Unified Data Protection\Engine.
3. Create a key named as VSSWrap.
4. Right-click VSSWrap, select New, and then select DWORD (32-bit) value and specify the name as VssAsynchRetryInterval.
5. Specify the value as required.

To increase the number of concurrent jobs, perform the following steps on the proxy server:

1. Open the Windows registry.
2. Navigate to HKLM\SOFTWARE\Arcserve\Unified Data Protection\Engine.
3. Right-click HyperVMaxJobNum, select Modify, and specify the value as required.