Form Initiator: jortialc@redhat.com

Customer Name: Siemens Numerical Control Ltd.

Business Impact:

The VMware-to-OpenShift migration project is a global strategic initiative for Siemens.

1. This problem blocks the VM backup procedure. No workaround available.
2. Executive Visibility: Siemens leadership(Director Visibility) is now personally involved and demands resolution immediately.
3. Financial Impact: This project represents a global TCV of $10.6M ($5.4M ACV), with over $500k in China.

Due to frequent product instability issues during the recent customer migration process, the user experience has been significantly impacted.

Escalation Ticket: https://access.redhat.com/watchlist/internal/aces/EN-90945

Bug Number: https://issues.redhat.com/browse/CNV-74530

Description:

Windows VM snapshot operations, either directly or using Velero, fail frequently with QuiesceFailed errors, even if next attempts succeed to freeze the filesystem.

During a failure we can see these kind of errors in the virt-launcher pod:

```

{"component":"virt-launcher","level":"error","msg":"Guest agent is not responding: Guest agent not available for now","pos":"qemuAgentSend:754","subcomponent":"libvirt","thread":"28","timestamp":"2026-01-19T08:29:57.915000Z"} {"component":"virt-launcher","level":"error","msg":"Failed to freeze vmi, virError(Code=86, Domain=10, Message='Guest agent is not responding: Guest agent not available for now')","pos":"manager.go:1765","timestamp":"2026-01-19T08:29:57.915712Z"} {"component":"virt-launcher","kind":"","level":"error","msg":"Failed to freeze vmi","name":"snc-server-104ef-acronis-lansweeper","namespace":"vm-it-mgmt","pos":"server.go:269","reason":"virError(Code=86, Domain=10, Message='Guest agent is not responding: Guest agent not available for now')","timestamp":"2026-01-19T08:29:57.915805Z","uid":"2f0b7a0c-c9c4-4d12-aed9-4078e325ad4a"}

```

Related bugs:

https://issues.redhat.com/browse/CNV-74530 (main)
https://issues.redhat.com/browse/CNV-54193
https://issues.redhat.com/browse/CNV-33664