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!