Unable to live migrate machines - VM Lacks Feature

Tomcatter

We are receiving an error when attempting to live migrate VMs from one server to another server (same hardware specification of server), inside the same pool.

We see the following error:

{
  "id": "0mawuvh8f",
  "properties": {
    "method": "vm.migrate",
    "params": {
      "targetHost": "b10aeb00-6c14-493a-840b-91637ddf9671",
      "vm": "b589e558-67d1-0bae-4380-4fb6f84a64e4"
    },
    "name": "API call: vm.migrate",
    "userId": "32de6276-fd63-420c-af84-d583b371f3ad",
    "type": "api.call"
  },
  "start": 1747766208255,
  "status": "failure",
  "updatedAt": 1747766208320,
  "end": 1747766208320,
  "result": {
    "code": "VM_LACKS_FEATURE",
    "params": [
      "OpaqueRef:01d74f01-b77c-a254-9c76-e19575ebe7dc"
    ],
    "task": {
      "uuid": "33cf253e-969c-c657-f968-0ae07bfeaf8e",
      "name_label": "Async.VM.pool_migrate",
      "name_description": "",
      "allowed_operations": [],
      "current_operations": {},
      "created": "20250520T18:36:48Z",
      "finished": "20250520T18:36:48Z",
      "status": "failure",
      "resident_on": "OpaqueRef:0fcd73b6-b83f-7f71-7529-a3647be6b793",
      "progress": 1,
      "type": "<none/>",
      "result": "",
      "error_info": [
        "VM_LACKS_FEATURE",
        "OpaqueRef:01d74f01-b77c-a254-9c76-e19575ebe7dc"
      ],
      "other_config": {},
      "subtask_of": "OpaqueRef:NULL",
      "subtasks": [],
      "backtrace": "(((process xapi)(filename ocaml/xapi/xapi_vm_lifecycle.ml)(line 742))((process xapi)(filename ocaml/xapi/xapi_vm_helpers.ml)(line 1653))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 24))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 39))((process xapi)(filename ocaml/xapi/helpers.ml)(line 1662))((process xapi)(filename ocaml/xapi/xapi_vm_helpers.ml)(line 1652))((process xapi)(filename ocaml/xapi/message_forwarding.ml)(line 2457))((process xapi)(filename ocaml/xapi/rbac.ml)(line 191))((process xapi)(filename ocaml/xapi/rbac.ml)(line 200))((process xapi)(filename ocaml/xapi/server_helpers.ml)(line 75)))"
    },
    "message": "VM_LACKS_FEATURE(OpaqueRef:01d74f01-b77c-a254-9c76-e19575ebe7dc)",
    "name": "XapiError",
    "stack": "XapiError: VM_LACKS_FEATURE(OpaqueRef:01d74f01-b77c-a254-9c76-e19575ebe7dc)\n    at Function.wrap (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/_XapiError.mjs:16:12)\n    at default (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/_getTaskResult.mjs:13:29)\n    at Xapi._addRecordToCache (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/index.mjs:1072:24)\n    at file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/index.mjs:1106:14\n    at Array.forEach (<anonymous>)\n    at Xapi._processEvents (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/index.mjs:1096:12)\n    at Xapi._watchEvents (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/index.mjs:1269:14)"
  }
}

Danp

Hi,

Have you installed the Guest Tools into the VM? Missing guest tools is the most common reason for this issues.

Regards, Dan

P.S. I edited your post to add markdown code around the log so that it is easier to read.

Tomcatter

Hi Dan,

The machines do have the guest tools installed and we do see that they are detected when viewing the VM.

Regards

dinhngtu

@Tomcatter Which guest OS and guest tools are you using?

Tomcatter

These are windows machines with the windows guest tools installed.

dinhngtu

@Tomcatter Is it the XenServer tools 9.4.0 you're using?

Tomcatter

we are using XCP-NG Windows Management Agent - 8.2.20

dinhngtu

@Tomcatter Could you run XenClean followed by installing XenServer tools 9.4.0?

Tomcatter

Can you confirm where i can find XenServer tools 9.4.0?

I can only see:

XCP-ng Windows PV Tools 9.0.9030 Testsign

At

https://github.com/xcp-ng/win-pv-drivers/releases

dinhngtu

@Tomcatter It's from Citrix: https://www.xenserver.com/downloads

coolsport00

This post is deleted!