Problem Description
Multiple VM backups are failing in the environment.
Error messages indicate failures in opening VDDK handles and disk files, with specific mentions of:
Missing guest VM credentials
Access rights issues to VMDK files
Cause
The issue is related to the environment’s network configuration.
Log analysis shows:
VMware App Aware Processing failed due to unassigned guest VM credentials
Access rights issues for one or more VMDK files of the VM
Traceback / Logs
[2025-07-18 05:38:01,490] [ERROR] Failed to open vddk handle for [diskpath=[EA-NONPROD-E001-DB4-GEN-VSAN] <UUID>/dblissvmp01.vmdk]. Retrying in 4 Seconds. Retry attempt remaining 2
SyncError: VMware App Aware Processing: Guest VM Credential not assigned. Please assign credential for the specified VM. (#10001001d) (Error Code : VMWARE29)
[2025-07-18 05:40:39,186] [ERROR] Failed to open the Disk [EA-NONPROD-E001-DB4-GEN-VSAN] <UUID>/dblissvmp01.vmdk
[2025-07-18 05:40:39,186] [ERROR] Error : You do not have access rights to one or more vmdk files of the VM.
Resolution
Assign guest VM credentials
Update the backup configuration to include the correct guest VM credentials for VMware App Aware Processing.
Verify and update access rights
Ensure the backup service account has full permissions to access all VMDK files of the VM.
Check network connectivity and permissions
Confirm stable network connectivity between the backup server and the vCenter/ESXi host.
Re-run the backup job
After making the above changes, run the job again to confirm successful completion.
If the issue persists:
Collect updated logs
Escalate to the Support Team for further investigation