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    Backups with qcow2 enabled

    Scheduled Pinned Locked Moved Backup
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    • acebmxerA Offline
      acebmxer @florent
      last edited by

      @florent

      Both full and delta passed...

      Full - 2026-04-17T11_32_42.906Z - backup NG.txt
      Delta - 2026-04-17T13_26_54.973Z - backup NG.txt

      @pilow

      I just restarted tool stack on both pool master and second host. Re-edit backup job to remove the purge snapshot with cbt and re-ran a delta backup. Which still fell back to full backup.

      P 1 Reply Last reply Reply Quote 0
      • P Offline
        Pilow @acebmxer
        last edited by

        @acebmxer bottom of POOL advanced tab, is BACKUP NETWORK selected on the NBD enabled network accessible by both hosts and XOA ?

        acebmxerA 1 Reply Last reply Reply Quote 0
        • acebmxerA Offline
          acebmxer @Pilow
          last edited by acebmxer

          @Pilow

          Was already configured...

          Screenshot 2026-04-17 102001.png

          Screenshot 2026-04-17 102051.png

          Think this is the issue....
          Network tab under pool.
          Screenshot 2026-04-17 102135.png

          Will run another delta once the current one finishes.

          Edit - update

          Can a warning be made if NBD is not enabled at the pool level? or make the error more clear?

          I enabled the nbd at the pool level and ran another delta - 2026-04-17T14_40_39.535Z - backup NG.txt

          I Then re-enable the purge snapshot in back up job and ran another delta. 2026-04-17T15_00_40.358Z - backup NG.txt

          Screenshot 2026-04-17 110321.png

          Screenshot 2026-04-17 111349.png

          P 1 Reply Last reply Reply Quote 0
          • acebmxerA acebmxer referenced this topic
          • P Offline
            Pilow @acebmxer
            last edited by

            @acebmxer so, NBD it was...

            holy molly, you have some good network performance !
            what kind of SR at source ? and remote at destination ?
            what about the PIFs ?

            acebmxerA 1 Reply Last reply Reply Quote 0
            • acebmxerA Offline
              acebmxer @Pilow
              last edited by acebmxer

              @Pilow

              Just a little old truenas running on AMD 5900x with 10 Gic nics bound, Unifi Agg switch with 10gb links to hosts.

              Storage 5 8tb tohisba drives and two 1tb nvme drives 1 for cache 1 for log vdev.

              Backup device is a DS1819+ with 4 12 tb seagate exo drives with 10gb link.

              Screenshot 2026-04-17 122521.png

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              • P Offline
                Pilow @acebmxer
                last edited by Pilow

                @acebmxer NFS remotes on the DS1819+ ?

                we have iSCSI SR (25Gb mellanox 6 PIFs on hosts to 25Gb MSA2062 SAN dual controller)
                our remotes are iSCSI os mounted volumes on MSA SANs, presented as S3 (minio VMs)
                using XO PROXIES to offload backups from XOA

                we max out a 150/200Mb/s during backups 😕

                but we are on VHD VDIs, asking myself if the added backup performance you present could be due to QCOW2 format on source SR ?
                will have to try VDIs on such SR to see the diff

                acebmxerA 1 Reply Last reply Reply Quote 0
                • acebmxerA Offline
                  acebmxer @Pilow
                  last edited by acebmxer

                  @Pilow Yes NFS on vm storage and on backup storage.

                  All vms are now on qcow2 except for the windows vm what was vhd. However i just mirgrated it over to qcow2. the Nics in all systems are the intel 10gb either x520 or x540

                  Edit - Sorry missed your question about performance vhd vers qcow2. I would say its on equal to. I didnt run any benchmarks for comparison. (probably should have) But havent seen any major slowness other then GC issues. (See latest post)

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                  • acebmxerA Offline
                    acebmxer
                    last edited by acebmxer

                    So progress bar seems to be working now on exporting. But i am also noticing Garbage collection seems to be running quite often that i feel its slowing down the import for the health check.

                    Screenshot_20260418_104201.png

                    Screenshot_20260418_104514.png

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                    • acebmxerA Offline
                      acebmxer
                      last edited by acebmxer

                      Next thing I am noticing that garbage collection is not able to coalesce vdi to vms that are running. garbage will keep trying to run every 30 - 45 seconds for 30 seconds run time. VDIs to coalesce will keep increasing unless a vm is powered off and given enough time for garbage collection to actually run.

                      Because garbage collection is spamming so often importing a vdi for health check will take logger.

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                      • acebmxerA Offline
                        acebmxer
                        last edited by acebmxer

                        @florent

                        I disabled CBT on the vms and re-ran a delta backup. I noticed the following.

                        While watching the backup task when it shows [XO] Exporting it will not show the percentage and completion. Watching backup task a vm will show not using NBD at first but using XO and then fail. The backup log will then show vm fell back to full backup and the task will then show that it is using NBD.

                        Screenshot_20260420_002103.png

                        Screenshot_20260420_002557.png

                        Screenshot_20260420_002717.png

                        Screenshot_20260420_003717.png

                        Also with out CBT GC is not constantly spamming once a vm has finished exporting and started health check. It appears to actually be running and able to coalesce as they are no longer showing in the dashboard / health...

                        delta job with CBT enabled - 2026-04-20T00_43_48.487Z - backup NG.txt

                        CBT disabled delta job. two vms fell back to full - 2026-04-20T03_19_02.894Z - backup NG.txt

                        Next delta job with CBT disabled 1 vm fell back to full - 2026-04-20T04_19_10.531Z - backup NG.txt

                        Screenshot_20260420_001804.png

                        Screenshot_20260420_010236.png

                        acebmxerA 1 Reply Last reply Reply Quote 0
                        • acebmxerA Offline
                          acebmxer @acebmxer
                          last edited by

                          Ok something is happening. I made no additional changes from last night. Now schedule backup job 1 pm is still going on 2 hours later.

                          Screenshot 2026-04-20 145633.png

                          Think i might revert back to VHD as this has cause so many issues.

                          florentF 1 Reply Last reply Reply Quote 0
                          • florentF Offline
                            florent Vates 🪐 XO Team @acebmxer
                            last edited by

                            @acebmxer do you have something in the xo logs ( journalct probably ) ?

                            acebmxerA 1 Reply Last reply Reply Quote 0
                            • acebmxerA Offline
                              acebmxer @florent
                              last edited by acebmxer

                              @florent said:

                              @acebmxer do you have something in the xo logs ( journalct probably ) ?

                              from host
                              sudo journalctl -u xo-server -n 50
                              -- No entries --

                              From XO - Currently on fbba0 commit (4 behind)

                              Apr 20 15:21:51 xo-ce xo-server[849]:   }
Apr 20 15:21:51 xo-ce xo-server[849]: }
Apr 20 15:22:35 xo-ce xo-server[849]: 2026-04-20T19:22:35.554Z xo:main INFO + Console proxy ( - 127.0.0.1)
Apr 20 15:22:41 xo-ce xo-server[849]: 2026-04-20T19:22:41.365Z xo:main INFO - Console proxy ( - 127.0.0.1)
Apr 20 15:22:55 xo-ce xo-server[849]: 2026-04-20T19:22:55.223Z xo:main INFO + Console proxy ( - 127.0.0.1)
Apr 20 15:23:04 xo-ce xo-server[849]: 2026-04-20T19:23:04.562Z xo:main INFO - Console proxy ( - 127.0.0.1)
Apr 20 16:11:49 xo-ce xo-server[849]: (node:849) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 update list>
Apr 20 16:11:49 xo-ce xo-server[849]: 2026-04-20T20:11:49.190Z xo:xo-server WARN Node warning {
Apr 20 16:11:49 xo-ce xo-server[849]:   error: MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 update listen>
Apr 20 16:11:49 xo-ce xo-server[849]:       at genericNodeError (node:internal/errors:985:15)
Apr 20 16:11:49 xo-ce xo-server[849]:       at wrappedFn (node:internal/errors:539:14)
Apr 20 16:11:49 xo-ce xo-server[849]:       at _addListener (node:events:590:17)
Apr 20 16:11:49 xo-ce xo-server[849]:       at Tasks.addListener (node:events:608:10)
Apr 20 16:11:49 xo-ce xo-server[849]:       at TaskController.getTasks (file:///opt/xen-orchestra/@xen-orchestra/rest-api/dist/tasks/tas>
Apr 20 16:11:49 xo-ce xo-server[849]:       at ExpressTemplateService.buildPromise (/opt/xen-orchestra/node_modules/@tsoa/runtime/src/ro>
Apr 20 16:11:49 xo-ce xo-server[849]:       at ExpressTemplateService.apiHandler (/opt/xen-orchestra/node_modules/@tsoa/runtime/src/rout>
Apr 20 16:11:49 xo-ce xo-server[849]:       at TaskController_getTasks (file:///opt/xen-orchestra/@xen-orchestra/rest-api/dist/open-api/>
Apr 20 16:11:49 xo-ce xo-server[849]:     emitter: Tasks {
Apr 20 16:11:49 xo-ce xo-server[849]:       _events: [Object: null prototype],
Apr 20 16:11:49 xo-ce xo-server[849]:       _eventsCount: 2,
Apr 20 16:11:49 xo-ce xo-server[849]:       _maxListeners: undefined,
Apr 20 16:11:49 xo-ce xo-server[849]:       Symbol(shapeMode): false,
Apr 20 16:11:49 xo-ce xo-server[849]:       Symbol(kCapture): false
Apr 20 16:11:49 xo-ce xo-server[849]:     },
Apr 20 16:11:49 xo-ce xo-server[849]:     type: 'update',
Apr 20 16:11:49 xo-ce xo-server[849]:     count: 11
Apr 20 16:11:49 xo-ce xo-server[849]:   }
Apr 20 16:11:49 xo-ce xo-server[849]: }
Apr 20 16:11:49 xo-ce xo-server[849]: (node:849) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 remove list>
Apr 20 16:11:49 xo-ce xo-server[849]: 2026-04-20T20:11:49.190Z xo:xo-server WARN Node warning {
Apr 20 16:11:49 xo-ce xo-server[849]:   error: MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 remove listen>
Apr 20 16:11:49 xo-ce xo-server[849]:       at genericNodeError (node:internal/errors:985:15)
Apr 20 16:11:49 xo-ce xo-server[849]:       at wrappedFn (node:internal/errors:539:14)
Apr 20 16:11:49 xo-ce xo-server[849]:       at _addListener (node:events:590:17)
Apr 20 16:11:49 xo-ce xo-server[849]:       at Tasks.addListener (node:events:608:10)
Apr 20 16:11:49 xo-ce xo-server[849]:       at TaskController.getTasks (file:///opt/xen-orchestra/@xen-orchestra/rest-api/dist/tasks/tas>
Apr 20 16:11:49 xo-ce xo-server[849]:       at ExpressTemplateService.buildPromise (/opt/xen-orchestra/node_modules/@tsoa/runtime/src/ro>
Apr 20 16:11:49 xo-ce xo-server[849]:       at ExpressTemplateService.apiHandler (/opt/xen-orchestra/node_modules/@tsoa/runtime/src/rout>
Apr 20 16:11:49 xo-ce xo-server[849]:       at TaskController_getTasks (file:///opt/xen-orchestra/@xen-orchestra/rest-api/dist/open-api/>
Apr 20 16:11:49 xo-ce xo-server[849]:     emitter: Tasks {
Apr 20 16:11:49 xo-ce xo-server[849]:       _events: [Object: null prototype],
Apr 20 16:11:49 xo-ce xo-server[849]:       _eventsCount: 2,
Apr 20 16:11:49 xo-ce xo-server[849]:       _maxListeners: undefined,
Apr 20 16:11:49 xo-ce xo-server[849]:       Symbol(shapeMode): false,
Apr 20 16:11:49 xo-ce xo-server[849]:       Symbol(kCapture): false
Apr 20 16:11:49 xo-ce xo-server[849]:     },
Apr 20 16:11:49 xo-ce xo-server[849]:     type: 'remove',
Apr 20 16:11:49 xo-ce xo-server[849]:     count: 11
Apr 20 16:11:49 xo-ce xo-server[849]:   }
Apr 20 16:11:49 xo-ce xo-server[849]: }
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                              • acebmxerA Offline
                                acebmxer
                                last edited by

                                @florent

                                Killed the current tasks. Updated xo to latest commit and start backups again... here are current errors from xo...

                                 sudo journalctl -u xo-server -n 50
Apr 20 17:29:54 xo-ce xo-server[3147]:   Symbol(undici.error.UND_ERR): true,
Apr 20 17:29:54 xo-ce xo-server[3147]:   Symbol(undici.error.UND_ERR_SOCKET): true
Apr 20 17:29:54 xo-ce xo-server[3147]: }
Apr 20 17:30:29 xo-ce xo-server[3262]: 2026-04-20T21:30:29.390Z xo:xapi:vdi INFO  OpaqueRef:4efd6d02-6c4d-26f8-7ed5-1b9b34daa89d has been disconnected from dom0>
Apr 20 17:30:29 xo-ce xo-server[3262]:   vdiRef: 'OpaqueRef:ce354818-4cf0-2ac3-8156-3d7118548ecd',
Apr 20 17:30:29 xo-ce xo-server[3262]:   vbdRef: 'OpaqueRef:4efd6d02-6c4d-26f8-7ed5-1b9b34daa89d'
Apr 20 17:30:29 xo-ce xo-server[3262]: }
Apr 20 17:30:29 xo-ce xo-server[3262]: 2026-04-20T21:30:29.392Z xo:xapi:xapi-disks WARN Either transmit the source to the constructor or implement openSource an>
Apr 20 17:30:29 xo-ce xo-server[3262]:   error: Error: Either transmit the source to the constructor or implement openSource and call init
Apr 20 17:30:29 xo-ce xo-server[3262]:       at get source (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:53:19)
Apr 20 17:30:29 xo-ce xo-server[3262]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:86>
Apr 20 17:30:29 xo-ce xo-server[3262]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQcow2StreamSource.mjs:61:18)
Apr 20 17:30:29 xo-ce xo-server[3262]:       at #openExportStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:189:21)
Apr 20 17:30:29 xo-ce xo-server[3262]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 20 17:30:29 xo-ce xo-server[3262]:       at async #openNbdStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:97:22)
Apr 20 17:30:29 xo-ce xo-server[3262]:       at async XapiDiskSource.openSource (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:258:18)
Apr 20 17:30:29 xo-ce xo-server[3262]:       at async XapiDiskSource.init (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:28:4>
Apr 20 17:30:29 xo-ce xo-server[3262]:       at async file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalVm.mjs:66:5
Apr 20 17:30:29 xo-ce xo-server[3262]:       at async Promise.all (index 0)
Apr 20 17:30:29 xo-ce xo-server[3262]: }
Apr 20 17:30:29 xo-ce xo-server[3262]: 2026-04-20T21:30:29.392Z xo:xapi:xapi-disks WARN can't compute delta OpaqueRef:ce354818-4cf0-2ac3-8156-3d7118548ecd from >
Apr 20 17:30:29 xo-ce xo-server[3262]:   error: BodyTimeoutError: Body Timeout Error
Apr 20 17:30:29 xo-ce xo-server[3262]:       at FastTimer.onParserTimeout [as _onTimeout] (/opt/xen-orchestra/node_modules/undici/lib/dispatcher/client-h1.js:64>
Apr 20 17:30:29 xo-ce xo-server[3262]:       at Timeout.onTick [as _onTimeout] (/opt/xen-orchestra/node_modules/undici/lib/util/timers.js:162:13)
Apr 20 17:30:29 xo-ce xo-server[3262]:       at listOnTimeout (node:internal/timers:605:17)
Apr 20 17:30:29 xo-ce xo-server[3262]:       at process.processTimers (node:internal/timers:541:7) {
Apr 20 17:30:29 xo-ce xo-server[3262]:     code: 'UND_ERR_BODY_TIMEOUT',
Apr 20 17:30:29 xo-ce xo-server[3262]:     Symbol(undici.error.UND_ERR): true,
Apr 20 17:30:29 xo-ce xo-server[3262]:     Symbol(undici.error.UND_ERR_BODY_TIMEOUT): true
Apr 20 17:30:29 xo-ce xo-server[3262]:   }
Apr 20 17:30:29 xo-ce xo-server[3262]: }
Apr 20 17:30:29 xo-ce xo-server[3262]: 2026-04-20T21:30:29.395Z xo:xapi:xapi-disks INFO export through qcow2
Apr 20 17:30:36 xo-ce xo-server[3262]: 2026-04-20T21:30:36.324Z xo:backups:worker ERROR unhandled error event {
Apr 20 17:30:36 xo-ce xo-server[3262]:   error: RequestAbortedError [AbortError]: Request aborted
Apr 20 17:30:36 xo-ce xo-server[3262]:       at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 20 17:30:36 xo-ce xo-server[3262]:       at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.mjs:40:22)
Apr 20 17:30:36 xo-ce xo-server[3262]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:86>
Apr 20 17:30:36 xo-ce xo-server[3262]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQcow2StreamSource.mjs:61:18)
Apr 20 17:30:36 xo-ce xo-server[3262]:       at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskLargerBlock.mjs:87:28)
Apr 20 17:30:36 xo-ce xo-server[3262]:       at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:34:29)
Apr 20 17:30:36 xo-ce xo-server[3262]:       at XapiStreamNbdSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:34:2>
Apr 20 17:30:36 xo-ce xo-server[3262]:       at XapiStreamNbdSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiStreamNbd.mjs:66:17)
Apr 20 17:30:36 xo-ce xo-server[3262]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 20 17:30:36 xo-ce xo-server[3262]:       at async #openNbdStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:108:7) {
Apr 20 17:30:36 xo-ce xo-server[3262]:     code: 'UND_ERR_ABORTED',
Apr 20 17:30:36 xo-ce xo-server[3262]:     Symbol(undici.error.UND_ERR): true,
Apr 20 17:30:36 xo-ce xo-server[3262]:     Symbol(undici.error.UND_ERR_ABORT): true,
Apr 20 17:30:36 xo-ce xo-server[3262]:     Symbol(undici.error.UND_ERR_ABORTED): true
Apr 20 17:30:36 xo-ce xo-server[3262]:   }
Apr 20 17:30:36 xo-ce xo-server[3262]: }
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                                • acebmxerA Offline
                                  acebmxer
                                  last edited by acebmxer

                                  @florent

                                  After some digging this is what I have come up with. Please double check everything...
                                  I can PM you the whole chat session if you like.

                                  Bug Report: XO Backup Intermittent Failure — RequestAbortedError During NBD Stream Init
                                  Environment:

                                  XCP-ng: 8.3.0 (build 20260408, xapi 26.1.3)
                                  xapi-nbd: 26.1.3-1.6.xcpng8.3
                                  xo-server: community edition (xen-orchestra from source)
                                  Pool: 2-node pool (host1 10.100.2.10, host2 10.100.2.11)
                                  Backup NFS target: 10.100.2.23:/volume1/backup
                                  Symptom:

                                  Scheduled backup jobs intermittently fail with RequestAbortedError: Request aborted during NBD stream initialization. The failure is transient — the same VMs back up successfully on subsequent runs.

                                  xo:backups:worker ERROR unhandled error event
                                  error: RequestAbortedError [AbortError]: Request aborted
                                  at BodyReadable.destroy (undici/lib/api/readable.js:51:13)
                                  at QcowStream.close (@xen-orchestra/qcow2/dist/disk/QcowStream.mjs:40:22)
                                  at XapiQcow2StreamSource.close (@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:86:28)
                                  at XapiQcow2StreamSource.close (@xen-orchestra/xapi/disks/XapiQcow2StreamSource.mjs:61:18)
                                  at DiskLargerBlock.close (@xen-orchestra/disk-transform/dist/DiskLargerBlock.mjs:87:28)
                                  at TimeoutDisk.close (@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:34:29)
                                  at XapiStreamNbdSource.close (@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:34:29)
                                  at XapiStreamNbdSource.init (@xen-orchestra/xapi/disks/XapiStreamNbd.mjs:66:17)
                                  at async #openNbdStream (@xen-orchestra/xapi/disks/Xapi.mjs:108:7)
                                  Root Cause Analysis:

                                  The error chain is misleading — QcowStream.close and BodyReadable.destroy are cleanup, not the cause. The actual failure is inside connectNbdClientIfPossible() called at XapiStreamNbd.mjs:66.

                                  The sequence in #openNbdStream (Xapi.mjs) is:

                                  #openExportStream() — opens a qcow2/VHD HTTP stream from XAPI (succeeds)
                                  new XapiStreamNbdSource(streamSource, ...) — wraps it
                                  await source.init() — calls super.init() then connectNbdClientIfPossible()
                                  If connectNbdClientIfPossible() throws for any reason other than NO_NBD_AVAILABLE, execution goes to the catch block in #openNbdStream which calls source?.close() — this closes the already-open qcow2 HTTP stream, producing the BodyReadable.destroy → AbortError cascade
                                  The underlying NBD connection failure: MultiNbdClient.connect() opens nbdConcurrency (default 2) sequential connections. Each NbdClient.connect() failure causes the candidate host to be removed and retried with another candidate. With only 2 hosts in the pool and nbdConcurrency=2, a single transient TLS or TCP failure on one host during the NBD option negotiation can exhaust all candidates, causing MultiNbdClient to throw NO_NBD_AVAILABLE — but this error IS caught and falls back to stream export. So the failure here is something else: a connection that partially succeeds then aborts, throwing a non-NO_NBD_AVAILABLE error that propagates uncaught to #openNbdStream's catch block.

                                  Specific issue: When nbdClient.connect() throws with UND_ERR_ABORTED (an undici abort), the error code is not NO_NBD_AVAILABLE, so #openNbdStream re-throws it instead of falling back to stream export. The backup then fails entirely rather than gracefully degrading.

                                  Proposed Fix:

                                  In Xapi.mjs, the catch block in #openNbdStream should treat any NBD connection failure as fallback-eligible, not just NO_NBD_AVAILABLE:

                                  } catch (err) {
                                  if (err.code === 'NO_NBD_AVAILABLE' || err.code === 'UND_ERR_ABORTED') {
                                  warn(can't connect through NBD, fall back to stream export, { err })
                                  if (streamSource === undefined) {
                                  throw new Error(Can't open stream source)
                                  }
                                  return streamSource
                                  }
                                  await source?.close().catch(warn)
                                  throw err
                                  }
                                  Or more robustly, treat any NBD connection error as fallback-eligible rather than hardcoding error codes:

                                  } catch (err) {
                                  warn(can't connect through NBD, fall back to stream export, { err })
                                  if (streamSource === undefined) {
                                  throw new Error(Can't open stream source)
                                  }
                                  return streamSource
                                  }
                                  This matches the intent of the existing NO_NBD_AVAILABLE fallback — NBD is opportunistic, and any failure to establish it should degrade gracefully to HTTP stream export rather than failing the entire backup job.

                                  Observed Timeline:

                                  02:22:11 — xo-server opens VHD + qcow2 export streams
                                  02:22:12–15 — NBD connections attempted, fail mid-handshake
                                  02:22:15 — backup fails with UND_ERR_ABORTED, no fallback
                                  02:33:51 — retry attempt also fails in 5 seconds
                                  23:03 — same VMs back up successfully (transient condition resolved)
                                  Impact: Backup jobs fail entirely on transient NBD connectivity issues instead of falling back to HTTP stream export, which is already implemented and working.

                                  You can file this at the XO GitHub issues or the XCP-ng forum. The fix is straightforward and low-risk — the fallback path already exists and works, it's just not being reached for UND_ERR_ABORTED errors.

                                  1 Reply Last reply Reply Quote 0
                                  • florentF Offline
                                    florent Vates 🪐 XO Team
                                    last edited by

                                    @acebmxer said:

                                    connectNbdClientIfPossible

                                    yes connectNbdClientIfPossible is the nearest error message from the real cause
                                    Now, why does it fails ?

                                    nbd should be enabled on the network used for backups , do you have a default backup network defined ?

                                    xo must have at least one VIF on this network

                                    acebmxerA 1 Reply Last reply Reply Quote 0
                                    • acebmxerA Offline
                                      acebmxer @florent
                                      last edited by acebmxer

                                      @florent said:

                                      @acebmxer said:

                                      connectNbdClientIfPossible

                                      yes connectNbdClientIfPossible is the nearest error message from the real cause
                                      Now, why does it fails ?

                                      nbd should be enabled on the network used for backups , do you have a default backup network defined ?

                                      xo must have at least one VIF on this network

                                      See post - https://xcp-ng.org/forum/post/104549 I do have backup network defined. I believe before doing the last round I did have NBD enabled at the pool level on the PIFs and the backup network defined. During trouble shooting it mentioned about NBD being the issue so i disabled NBD, I left the backup pool network defined. I send PM of chat working to the conclusion. Also i did re-add a vhd first SR and migrated the vm "Docker of Things" to that since that was one of the vms i was having constant issues with.

                                      the last backups logs...
                                      2026-04-20T04_19_10.531Z - backup NG.txt
                                      2026-04-20T17_04_48.232Z - backup NG.txt
                                      2026-04-20T21_24_14.738Z - backup NG.txt
                                      2026-04-21T02_22_08.642Z - backup NG.txt
                                      2026-04-21T04_16_26.094Z - backup NG.txt
                                      First success full with NBD disabled 2026-04-21T04_24_12.036Z - backup NG.txt
                                      Just ran again this morning expected it to pass but 2 vms failed - 2026-04-21T10_10_14.175Z - backup NG.txt

                                      With NBD disabled looks like the Host does the backup not xo itself...

                                      Screenshot_20260421_061258.png

                                      Screenshot_20260421_061319.png

                                      florentF 1 Reply Last reply Reply Quote 0
                                      • florentF Offline
                                        florent Vates 🪐 XO Team @acebmxer
                                        last edited by

                                        @acebmxer the connectnbdclient error won't be in the task log, but in the system log

                                        qcow2 backup need NBD

                                        acebmxerA 1 Reply Last reply Reply Quote 0
                                        • acebmxerA Offline
                                          acebmxer @florent
                                          last edited by

                                          @florent

                                          {10:42}~ ➭ journalctl -u xo-server --since "7:00"
Apr 21 07:02:34 xo-ce xo-server[12334]: 2026-04-21T11:02:34.586Z xo:xapi:xapi-disks WARN can't connect through NBD, fall back to stream >
Apr 21 07:02:34 xo-ce xo-server[12334]: 2026-04-21T11:02:34.663Z xo:backups:worker ERROR unhandled error event {
Apr 21 07:02:34 xo-ce xo-server[12334]:   error: Error: Method not implemented.
Apr 21 07:02:34 xo-ce xo-server[12334]:       at QcowStream.instantiateParent (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/d>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at XapiQcow2StreamSource.instantiateParent (file:///opt/xen-orchestra/@xen-orchestra/disk->
Apr 21 07:02:34 xo-ce xo-server[12334]:       at XapiQcow2StreamSource.openParent (file:///opt/xen-orchestra/@xen-orchestra/disk-transfo>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at DiskLargerBlock.readBlock (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at DiskLargerBlock.buildDiskBlockGenerator (file:///opt/xen-orchestra/@xen-orchestra/disk->
Apr 21 07:02:34 xo-ce xo-server[12334]:       at buildDiskBlockGenerator.next (<anonymous>)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at Timeout.next (file:///opt/xen-orchestra/@vates/generator-toolbox/dist/timeout.mjs:13:41)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at generatorWithLength (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Throt>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at generatorWithLength.next (<anonymous>)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at Throttle.createThrottledGenerator (file:///opt/xen-orchestra/@vates/generator-toolbox/d>
Apr 21 07:02:34 xo-ce xo-server[12334]: }
Apr 21 07:02:34 xo-ce xo-server[12334]: 2026-04-21T11:02:34.663Z xo:backups:worker ERROR unhandled error event {
Apr 21 07:02:34 xo-ce xo-server[12334]:   error: RequestAbortedError [AbortError]: Request aborted
Apr 21 07:02:34 xo-ce xo-server[12334]:       at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at XapiDiskSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Disk>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at ThrottledDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskP>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at ThrottledDisk.diskBlocks (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 07:02:34 xo-ce xo-server[12334]:     code: 'UND_ERR_ABORTED',
Apr 21 07:02:34 xo-ce xo-server[12334]:     Symbol(undici.error.UND_ERR): true,
Apr 21 07:02:34 xo-ce xo-server[12334]:     Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 07:02:34 xo-ce xo-server[12334]:     Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 07:02:34 xo-ce xo-server[12334]:   }
Apr 21 07:02:34 xo-ce xo-server[12334]: }
Apr 21 07:02:34 xo-ce xo-server[12334]: {
Apr 21 07:02:34 xo-ce xo-server[12334]:   err: Error: Method not implemented.
Apr 21 07:02:34 xo-ce xo-server[12334]:       at QcowStream.instantiateParent (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/d>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at XapiQcow2StreamSource.instantiateParent (file:///opt/xen-orchestra/@xen-orchestra/disk->
Apr 21 07:02:34 xo-ce xo-server[12334]:       at XapiQcow2StreamSource.openParent (file:///opt/xen-orchestra/@xen-orchestra/disk-transfo>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at DiskLargerBlock.readBlock (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at DiskLargerBlock.buildDiskBlockGenerator (file:///opt/xen-orchestra/@xen-orchestra/disk->
Apr 21 07:02:34 xo-ce xo-server[12334]:       at buildDiskBlockGenerator.next (<anonymous>)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at Timeout.next (file:///opt/xen-orchestra/@vates/generator-toolbox/dist/timeout.mjs:13:41)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at generatorWithLength (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Throt>
Apr 21 07:02:34 xo-ce xo-server[12334]:       at generatorWithLength.next (<anonymous>)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at Throttle.createThrottledGenerator (file:///opt/xen-orchestra/@vates/generator-toolbox/d>
Apr 21 07:02:34 xo-ce xo-server[12334]: }
Apr 21 07:02:34 xo-ce xo-server[12334]: 2026-04-21T11:02:34.666Z xo:backups:AbstractVmRunner WARN writer step failed {
Apr 21 07:02:34 xo-ce xo-server[12334]:   error: Error: ENOENT: no such file or directory, open '/run/xo-server/mounts/3ba9eed2-55f1-476>
Apr 21 07:02:34 xo-ce xo-server[12334]:   From:
Apr 21 07:02:34 xo-ce xo-server[12334]:       at NfsHandler.addSyncStackTrace (/opt/xen-orchestra/@xen-orchestra/fs/dist/local.js:21:26)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at NfsHandler._openFile (/opt/xen-orchestra/@xen-orchestra/fs/dist/local.js:154:35)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at /opt/xen-orchestra/@xen-orchestra/fs/dist/utils.js:29:26
Apr 21 07:02:34 xo-ce xo-server[12334]:       at new Promise (<anonymous>)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at NfsHandler.<anonymous> (/opt/xen-orchestra/@xen-orchestra/fs/dist/utils.js:24:12)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at loopResolver (/opt/xen-orchestra/node_modules/promise-toolbox/retry.js:83:46)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at new Promise (<anonymous>)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at loop (/opt/xen-orchestra/node_modules/promise-toolbox/retry.js:85:22)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at NfsHandler.retry (/opt/xen-orchestra/node_modules/promise-toolbox/retry.js:87:10)
Apr 21 07:02:34 xo-ce xo-server[12334]:       at NfsHandler._openFile (/opt/xen-orchestra/node_modules/promise-toolbox/retry.js:103:18) {
Apr 21 07:02:34 xo-ce xo-server[12334]:     errno: -2,
Apr 21 07:02:34 xo-ce xo-server[12334]:     code: 'ENOENT',
Apr 21 07:02:34 xo-ce xo-server[12334]:     syscall: 'open',
Apr 21 07:02:34 xo-ce xo-server[12334]:     path: '/run/xo-server/mounts/3ba9eed2-55f1-4760-ac08-655c252aa316/xo-vm-backups/fb72a8d7-a03>
Apr 21 07:02:34 xo-ce xo-server[12334]:   },
Apr 21 07:02:34 xo-ce xo-server[12334]:   step: 'writer.updateUuidAndChain()',
Apr 21 07:02:34 xo-ce xo-server[12334]:   writer: 'IncrementalRemoteWriter'
Apr 21 07:02:34 xo-ce xo-server[12334]: }
Apr 21 07:02:35 xo-ce xo-server[12334]: 2026-04-21T11:02:35.100Z xo:xapi WARN retry {
Apr 21 07:02:35 xo-ce xo-server[12334]:   attemptNumber: 0,
Apr 21 07:02:35 xo-ce xo-server[12334]:   delay: 5000,
Apr 21 07:02:35 xo-ce xo-server[12334]:   error: XapiError: VDI_IN_USE(OpaqueRef:e1cfcc8f-1060-150d-8514-2d625fe79aa7, destroy)
Apr 21 07:02:35 xo-ce xo-server[12334]:       at XapiError.wrap (file:///opt/xen-orchestra/packages/xen-api/_XapiError.mjs:16:12)
Apr 21 07:02:35 xo-ce xo-server[12334]:       at default (file:///opt/xen-orchestra/packages/xen-api/_getTaskResult.mjs:13:29)
Apr 21 07:02:35 xo-ce xo-server[12334]:       at Xapi._addRecordToCache (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1078:24)
Apr 21 07:02:35 xo-ce xo-server[12334]:       at file:///opt/xen-orchestra/packages/xen-api/index.mjs:1112:14
Apr 21 07:02:35 xo-ce xo-server[12334]:       at Array.forEach (<anonymous>)
Apr 21 07:02:35 xo-ce xo-server[12334]:       at Xapi._processEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1102:12)
Apr 21 07:02:35 xo-ce xo-server[12334]:       at Xapi._watchEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1275:14)
Apr 21 07:02:35 xo-ce xo-server[12334]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 07:02:35 xo-ce xo-server[12334]:     code: 'VDI_IN_USE',
Apr 21 07:02:35 xo-ce xo-server[12334]:     params: [ 'OpaqueRef:e1cfcc8f-1060-150d-8514-2d625fe79aa7', 'destroy' ],
Apr 21 07:02:35 xo-ce xo-server[12334]:     call: undefined,
Apr 21 07:02:35 xo-ce xo-server[12334]:     url: undefined,
Apr 21 07:02:35 xo-ce xo-server[12334]:     task: task {
Apr 21 07:02:35 xo-ce xo-server[12334]:       uuid: '71d29445-16f6-2ce9-5380-d67b08c2d4ec',
Apr 21 07:02:35 xo-ce xo-server[12334]:       name_label: 'Async.VDI.destroy',
Apr 21 07:02:35 xo-ce xo-server[12334]:       name_description: '',
Apr 21 07:02:35 xo-ce xo-server[12334]:       allowed_operations: [],
Apr 21 07:02:35 xo-ce xo-server[12334]:       current_operations: {},
Apr 21 07:02:35 xo-ce xo-server[12334]:       created: '20260421T11:02:34Z',
Apr 21 07:02:35 xo-ce xo-server[12334]:       finished: '20260421T11:02:34Z',
Apr 21 07:02:35 xo-ce xo-server[12334]:       status: 'failure',
Apr 21 07:02:35 xo-ce xo-server[12334]:       resident_on: 'OpaqueRef:2b1bb3f1-ceee-ba8f-62d9-74362fee8b3d',
Apr 21 07:02:35 xo-ce xo-server[12334]:       progress: 1,
Apr 21 07:02:35 xo-ce xo-server[12334]:       type: '<none/>',
Apr 21 07:02:35 xo-ce xo-server[12334]:       result: '',
Apr 21 07:02:35 xo-ce xo-server[12334]:       error_info: [Array],
Apr 21 07:02:35 xo-ce xo-server[12334]:       other_config: {},
Apr 21 07:02:35 xo-ce xo-server[12334]:       subtask_of: 'OpaqueRef:NULL',
Apr 21 07:02:35 xo-ce xo-server[12334]:       subtasks: [],
Apr 21 07:02:35 xo-ce xo-server[12334]:       backtrace: '(((process xapi)(filename ocaml/xapi/message_forwarding.ml)(line 5212))((proce>
Apr 21 07:02:35 xo-ce xo-server[12334]:     }
Apr 21 07:02:35 xo-ce xo-server[12334]:   },
Apr 21 07:02:35 xo-ce xo-server[12334]:   fn: 'destroy',
Apr 21 07:02:35 xo-ce xo-server[12334]:   arguments: [ 'OpaqueRef:e1cfcc8f-1060-150d-8514-2d625fe79aa7' ],
Apr 21 07:02:35 xo-ce xo-server[12334]:   pool: {
Apr 21 07:02:35 xo-ce xo-server[12334]:     uuid: '939ed551-fbd6-9868-52d8-d3997b7bf7da',
Apr 21 07:02:35 xo-ce xo-server[12334]:     name_label: 'xcp-ng-Pool1'
Apr 21 07:02:35 xo-ce xo-server[12334]:   }
Apr 21 07:02:35 xo-ce xo-server[12334]: }
Apr 21 07:02:35 xo-ce xo-server[12334]: 2026-04-21T11:02:35.701Z xo:xapi:vdi INFO  OpaqueRef:bb28f5cf-3b2e-2bb2-4f91-bcf86594007f was al>
Apr 21 07:02:35 xo-ce xo-server[12334]:   vdiRef: 'OpaqueRef:e1cfcc8f-1060-150d-8514-2d625fe79aa7',
Apr 21 07:02:35 xo-ce xo-server[12334]:   vbdRef: 'OpaqueRef:bb28f5cf-3b2e-2bb2-4f91-bcf86594007f'
Apr 21 07:02:35 xo-ce xo-server[12334]: }
Apr 21 07:02:41 xo-ce xo-server[12334]: 2026-04-21T11:02:41.221Z xo:backups:worker INFO backup has ended
Apr 21 07:02:41 xo-ce xo-server[11902]: 2026-04-21T11:02:41.222Z xo:backups:backupWorker WARN incorrect value passed to logger { level: >
Apr 21 07:02:41 xo-ce sudo[12436]: xo-service : PWD=/opt/xen-orchestra/packages/xo-server ; USER=root ; COMMAND=/usr/bin/umount /run/xo->
Apr 21 07:02:41 xo-ce sudo[12436]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=996)
Apr 21 07:02:41 xo-ce sudo[12436]: pam_unix(sudo:session): session closed for user root
Apr 21 07:03:11 xo-ce xo-server[12334]: 2026-04-21T11:03:11.265Z xo:backups:worker WARN worker process did not exit automatically, forci>
Apr 21 07:03:11 xo-ce xo-server[12334]: 2026-04-21T11:03:11.266Z xo:backups:worker INFO process will exit {
Apr 21 07:03:11 xo-ce xo-server[12334]:   duration: 406553270,
Apr 21 07:03:11 xo-ce xo-server[12334]:   exitCode: 0,
Apr 21 07:03:11 xo-ce xo-server[12334]:   resourceUsage: {
Apr 21 07:03:11 xo-ce xo-server[12334]:     userCPUTime: 8354715,
Apr 21 07:03:11 xo-ce xo-server[12334]:     systemCPUTime: 2569287,
Apr 21 07:03:11 xo-ce xo-server[12334]:     maxRSS: 75452,
Apr 21 07:03:11 xo-ce xo-server[12334]:     sharedMemorySize: 0,
Apr 21 07:03:11 xo-ce xo-server[12334]:     unsharedDataSize: 0,
Apr 21 07:03:11 xo-ce xo-server[12334]:     unsharedStackSize: 0,
Apr 21 07:03:11 xo-ce xo-server[12334]:     minorPageFault: 141970,
Apr 21 07:03:11 xo-ce xo-server[12334]:     majorPageFault: 0,
Apr 21 07:03:11 xo-ce xo-server[12334]:     swappedOut: 0,
Apr 21 07:03:11 xo-ce xo-server[12334]:     fsRead: 14032,
Apr 21 07:03:11 xo-ce xo-server[12334]:     fsWrite: 2022432,
Apr 21 07:03:11 xo-ce xo-server[12334]:     ipcSent: 0,
Apr 21 07:03:11 xo-ce xo-server[12334]:     ipcReceived: 0,
Apr 21 07:03:11 xo-ce xo-server[12334]:     signalsCount: 0,
Apr 21 07:03:11 xo-ce xo-server[12334]:     voluntaryContextSwitches: 20646,
Apr 21 07:03:11 xo-ce xo-server[12334]:     involuntaryContextSwitches: 1082
Apr 21 07:03:11 xo-ce xo-server[12334]:   },
Apr 21 07:03:11 xo-ce xo-server[12334]:   summary: { duration: '7m', cpuUsage: '3%', memoryUsage: '73.68 MiB' }
Apr 21 07:03:11 xo-ce xo-server[12334]: }
Apr 21 07:16:13 xo-ce xo-server[12608]: 2026-04-21T11:16:13.882Z xo:backups:worker INFO starting backup
Apr 21 07:16:13 xo-ce sudo[12621]: xo-service : PWD=/opt/xen-orchestra/packages/xo-server ; USER=root ; COMMAND=/usr/bin/mount -o  -t nf>
Apr 21 07:16:13 xo-ce sudo[12621]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=996)
Apr 21 07:16:13 xo-ce sudo[12621]: pam_unix(sudo:session): session closed for user root
Apr 21 07:16:17 xo-ce xo-server[12608]: 2026-04-21T11:16:17.213Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 07:16:18 xo-ce xo-server[12608]: 2026-04-21T11:16:18.902Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 07:16:20 xo-ce xo-server[12608]: 2026-04-21T11:16:20.784Z xo:xapi:xapi-disks WARN can't connect through NBD, fall back to stream >
Apr 21 07:16:23 xo-ce xo-server[12608]: 2026-04-21T11:16:23.412Z xo:xapi:xapi-disks WARN can't connect through NBD, fall back to stream >
Apr 21 07:19:01 xo-ce xo-server[12608]: 2026-04-21T11:19:01.857Z xo:backups:worker ERROR unhandled error event {
Apr 21 07:19:01 xo-ce xo-server[12608]:   error: RequestAbortedError [AbortError]: Request aborted
Apr 21 07:19:01 xo-ce xo-server[12608]:       at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 07:19:01 xo-ce xo-server[12608]:       at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 07:19:01 xo-ce xo-server[12608]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 07:19:01 xo-ce xo-server[12608]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 07:19:01 xo-ce xo-server[12608]:       at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 07:19:01 xo-ce xo-server[12608]:       at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 07:19:01 xo-ce xo-server[12608]:       at XapiDiskSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Disk>
Apr 21 07:19:01 xo-ce xo-server[12608]:       at ThrottledDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskP>
Apr 21 07:19:01 xo-ce xo-server[12608]:       at ThrottledDisk.diskBlocks (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/>
Apr 21 07:19:01 xo-ce xo-server[12608]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 07:19:01 xo-ce xo-server[12608]:     code: 'UND_ERR_ABORTED',
Apr 21 07:19:01 xo-ce xo-server[12608]:     Symbol(undici.error.UND_ERR): true,
Apr 21 07:19:01 xo-ce xo-server[12608]:     Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 07:19:01 xo-ce xo-server[12608]:     Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 07:19:01 xo-ce xo-server[12608]:   }
Apr 21 07:19:01 xo-ce xo-server[12608]: }
Apr 21 07:19:08 xo-ce xo-server[12608]: 2026-04-21T11:19:08.560Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 07:19:15 xo-ce xo-server[12608]: 2026-04-21T11:19:15.707Z xo:xapi:xapi-disks WARN can't connect through NBD, fall back to stream >
Apr 21 07:23:10 xo-ce xo-server[12608]: 2026-04-21T11:23:10.978Z xo:backups:worker ERROR unhandled error event {
Apr 21 07:23:10 xo-ce xo-server[12608]:   error: RequestAbortedError [AbortError]: Request aborted
Apr 21 07:23:10 xo-ce xo-server[12608]:       at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 07:23:10 xo-ce xo-server[12608]:       at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 07:23:10 xo-ce xo-server[12608]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 07:23:10 xo-ce xo-server[12608]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 07:23:10 xo-ce xo-server[12608]:       at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 07:23:10 xo-ce xo-server[12608]:       at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 07:23:10 xo-ce xo-server[12608]:       at XapiDiskSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Disk>
Apr 21 07:23:10 xo-ce xo-server[12608]:       at ThrottledDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskP>
Apr 21 07:23:10 xo-ce xo-server[12608]:       at ThrottledDisk.diskBlocks (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/>
Apr 21 07:23:10 xo-ce xo-server[12608]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 07:23:10 xo-ce xo-server[12608]:     code: 'UND_ERR_ABORTED',
Apr 21 07:23:10 xo-ce xo-server[12608]:     Symbol(undici.error.UND_ERR): true,
Apr 21 07:23:10 xo-ce xo-server[12608]:     Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 07:23:10 xo-ce xo-server[12608]:     Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 07:23:10 xo-ce xo-server[12608]:   }
Apr 21 07:23:10 xo-ce xo-server[12608]: }
Apr 21 07:26:43 xo-ce xo-server[12608]: 2026-04-21T11:26:43.361Z xo:backups:worker ERROR unhandled error event {
Apr 21 07:26:43 xo-ce xo-server[12608]:   error: RequestAbortedError [AbortError]: Request aborted
Apr 21 07:26:43 xo-ce xo-server[12608]:       at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 07:26:43 xo-ce xo-server[12608]:       at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 07:26:43 xo-ce xo-server[12608]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 07:26:43 xo-ce xo-server[12608]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 07:26:43 xo-ce xo-server[12608]:       at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 07:26:43 xo-ce xo-server[12608]:       at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 07:26:43 xo-ce xo-server[12608]:       at XapiDiskSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Disk>
Apr 21 07:26:43 xo-ce xo-server[12608]:       at ThrottledDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskP>
Apr 21 07:26:43 xo-ce xo-server[12608]:       at ThrottledDisk.diskBlocks (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/>
Apr 21 07:26:43 xo-ce xo-server[12608]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 07:26:43 xo-ce xo-server[12608]:     code: 'UND_ERR_ABORTED',
Apr 21 07:26:43 xo-ce xo-server[12608]:     Symbol(undici.error.UND_ERR): true,
Apr 21 07:26:43 xo-ce xo-server[12608]:     Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 07:26:43 xo-ce xo-server[12608]:     Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 07:26:43 xo-ce xo-server[12608]:   }
Apr 21 07:26:43 xo-ce xo-server[12608]: }
Apr 21 07:26:47 xo-ce xo-server[12608]: 2026-04-21T11:26:47.173Z xo:backups:worker INFO backup has ended
Apr 21 07:26:47 xo-ce sudo[12778]: xo-service : PWD=/opt/xen-orchestra/packages/xo-server ; USER=root ; COMMAND=/usr/bin/umount /run/xo->
Apr 21 07:26:47 xo-ce sudo[12778]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=996)
Apr 21 07:26:47 xo-ce sudo[12778]: pam_unix(sudo:session): session closed for user root
Apr 21 07:26:47 xo-ce xo-server[12608]: 2026-04-21T11:26:47.222Z xo:backups:worker INFO process will exit {
Apr 21 07:26:47 xo-ce xo-server[12608]:   duration: 633339340,
Apr 21 07:26:47 xo-ce xo-server[12608]:   exitCode: 0,
Apr 21 07:26:47 xo-ce xo-server[12608]:   resourceUsage: {
Apr 21 07:26:47 xo-ce xo-server[12608]:     userCPUTime: 1260533493,
Apr 21 07:26:47 xo-ce xo-server[12608]:     systemCPUTime: 332811098,
Apr 21 07:26:47 xo-ce xo-server[12608]:     maxRSS: 419224,
Apr 21 07:26:47 xo-ce xo-server[12608]:     sharedMemorySize: 0,
Apr 21 07:26:47 xo-ce xo-server[12608]:     unsharedDataSize: 0,
Apr 21 07:26:47 xo-ce xo-server[12608]:     unsharedStackSize: 0,
Apr 21 07:26:47 xo-ce xo-server[12608]:     minorPageFault: 3113937,
Apr 21 07:26:47 xo-ce xo-server[12608]:     majorPageFault: 0,
Apr 21 07:26:47 xo-ce xo-server[12608]:     swappedOut: 0,
Apr 21 07:26:47 xo-ce xo-server[12608]:     fsRead: 14920,
Apr 21 07:26:47 xo-ce xo-server[12608]:     fsWrite: 440514224,
Apr 21 07:26:47 xo-ce xo-server[12608]:     ipcSent: 0,
Apr 21 07:26:47 xo-ce xo-server[12608]:     ipcReceived: 0,
Apr 21 07:26:47 xo-ce xo-server[12608]:     signalsCount: 0,
Apr 21 07:26:47 xo-ce xo-server[12608]:     voluntaryContextSwitches: 4431961,
Apr 21 07:26:47 xo-ce xo-server[12608]:     involuntaryContextSwitches: 1742254
Apr 21 07:26:47 xo-ce xo-server[12608]:   },
Apr 21 07:26:47 xo-ce xo-server[12608]:   summary: { duration: '11m', cpuUsage: '252%', memoryUsage: '409.4 MiB' }
Apr 21 07:26:47 xo-ce xo-server[12608]: }
                                          1 Reply Last reply Reply Quote 0
                                          • acebmxerA Offline
                                            acebmxer
                                            last edited by

                                            for further testing. I have reneabled NBD at the pool network level and it shows on the host...

                                            Screenshot 2026-04-21 104541.png

                                            Screenshot 2026-04-21 104632.png

                                            Screenshot 2026-04-21 104711.png

                                            Screenshot 2026-04-21 104746.png

                                            While the current backup job is running from the above changes...

                                            Apr 21 07:26:47 xo-ce xo-server[12608]:     involuntaryContextSwitches: 1742254
Apr 21 07:26:47 xo-ce xo-server[12608]:   },
Apr 21 07:26:47 xo-ce xo-server[12608]:   summary: { duration: '11m', cpuUsage: '252%', memoryUsage: '409.4 MiB' }
Apr 21 07:26:47 xo-ce xo-server[12608]: }
Apr 21 10:48:11 xo-ce xo-server[15087]: 2026-04-21T14:48:11.691Z xo:backups:worker INFO starting backup
Apr 21 10:48:11 xo-ce sudo[15100]: xo-service : PWD=/opt/xen-orchestra/packages/xo-server ; USER=root ; COMMAND=/usr/bin/mount -o  -t nf>
Apr 21 10:48:11 xo-ce sudo[15100]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=996)
Apr 21 10:48:11 xo-ce sudo[15100]: pam_unix(sudo:session): session closed for user root
Apr 21 10:48:14 xo-ce xo-server[15087]: 2026-04-21T14:48:14.985Z xo:xapi:xapi-disks INFO Error in openNbdCBT Error: CBT is disabled
Apr 21 10:48:14 xo-ce xo-server[15087]:     at XapiVhdCbtSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiVhdCbt.mjs>
Apr 21 10:48:14 xo-ce xo-server[15087]:     at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 10:48:14 xo-ce xo-server[15087]:     at async #openNbdCbt (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:222:7)
Apr 21 10:48:14 xo-ce xo-server[15087]:     at async XapiDiskSource.openSource (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi>
Apr 21 10:48:14 xo-ce xo-server[15087]:     at async XapiDiskSource.init (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/D>
Apr 21 10:48:14 xo-ce xo-server[15087]:     at async file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalVm.mjs:66:5
Apr 21 10:48:14 xo-ce xo-server[15087]:     at async Promise.all (index 1)
Apr 21 10:48:14 xo-ce xo-server[15087]:     at async cancelableMap (file:///opt/xen-orchestra/@xen-orchestra/backups/_cancelableMap.mjs:>
Apr 21 10:48:14 xo-ce xo-server[15087]:     at async exportIncrementalVm (file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalV>
Apr 21 10:48:14 xo-ce xo-server[15087]:     at async IncrementalXapiVmBackupRunner._copy (file:///opt/xen-orchestra/@xen-orchestra/backu>
Apr 21 10:48:14 xo-ce xo-server[15087]:   code: 'CBT_DISABLED'
Apr 21 10:48:14 xo-ce xo-server[15087]: }
Apr 21 10:48:14 xo-ce xo-server[15087]: 2026-04-21T14:48:14.986Z xo:xapi:xapi-disks INFO export through vhd
Apr 21 10:48:15 xo-ce xo-server[15087]: 2026-04-21T14:48:15.166Z xo:xapi:xapi-disks INFO Error in openNbdCBT Error: CBT is disabled
Apr 21 10:48:15 xo-ce xo-server[15087]:     at XapiVhdCbtSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiVhdCbt.mjs>
Apr 21 10:48:15 xo-ce xo-server[15087]:     at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 10:48:15 xo-ce xo-server[15087]:     at async #openNbdCbt (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:222:7)
Apr 21 10:48:15 xo-ce xo-server[15087]:     at async XapiDiskSource.openSource (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi>
Apr 21 10:48:15 xo-ce xo-server[15087]:     at async XapiDiskSource.init (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/D>
Apr 21 10:48:15 xo-ce xo-server[15087]:     at async file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalVm.mjs:66:5
Apr 21 10:48:15 xo-ce xo-server[15087]:     at async Promise.all (index 0)
Apr 21 10:48:15 xo-ce xo-server[15087]:     at async cancelableMap (file:///opt/xen-orchestra/@xen-orchestra/backups/_cancelableMap.mjs:>
Apr 21 10:48:15 xo-ce xo-server[15087]:     at async exportIncrementalVm (file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalV>
Apr 21 10:48:15 xo-ce xo-server[15087]:     at async IncrementalXapiVmBackupRunner._copy (file:///opt/xen-orchestra/@xen-orchestra/backu>
Apr 21 10:48:15 xo-ce xo-server[15087]:   code: 'CBT_DISABLED'
Apr 21 10:48:15 xo-ce xo-server[15087]: }
Apr 21 10:48:15 xo-ce xo-server[15087]: 2026-04-21T14:48:15.167Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 10:48:53 xo-ce xo-server[15087]: 2026-04-21T14:48:53.864Z xo:xapi:xapi-disks INFO Error in openNbdCBT Error: CBT is disabled
Apr 21 10:48:53 xo-ce xo-server[15087]:     at XapiVhdCbtSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiVhdCbt.mjs>
Apr 21 10:48:53 xo-ce xo-server[15087]:     at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 10:48:53 xo-ce xo-server[15087]:     at async #openNbdCbt (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:222:7)
Apr 21 10:48:53 xo-ce xo-server[15087]:     at async XapiDiskSource.openSource (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi>
Apr 21 10:48:53 xo-ce xo-server[15087]:     at async XapiDiskSource.init (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/D>
Apr 21 10:48:53 xo-ce xo-server[15087]:     at async file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalVm.mjs:66:5
Apr 21 10:48:53 xo-ce xo-server[15087]:     at async Promise.all (index 0)
Apr 21 10:48:53 xo-ce xo-server[15087]:     at async cancelableMap (file:///opt/xen-orchestra/@xen-orchestra/backups/_cancelableMap.mjs:>
Apr 21 10:48:53 xo-ce xo-server[15087]:     at async exportIncrementalVm (file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalV>
Apr 21 10:48:53 xo-ce xo-server[15087]:     at async IncrementalXapiVmBackupRunner._copy (file:///opt/xen-orchestra/@xen-orchestra/backu>
Apr 21 10:48:53 xo-ce xo-server[15087]:   code: 'CBT_DISABLED'
Apr 21 10:48:53 xo-ce xo-server[15087]: }
Apr 21 10:48:53 xo-ce xo-server[15087]: 2026-04-21T14:48:53.867Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 10:49:23 xo-ce xo-server[15087]: 2026-04-21T14:49:23.821Z xo:backups:worker ERROR unhandled error event {
Apr 21 10:49:23 xo-ce xo-server[15087]:   error: RequestAbortedError [AbortError]: Request aborted
Apr 21 10:49:23 xo-ce xo-server[15087]:       at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 10:49:23 xo-ce xo-server[15087]:       at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 10:49:23 xo-ce xo-server[15087]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 10:49:23 xo-ce xo-server[15087]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 10:49:23 xo-ce xo-server[15087]:       at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 10:49:23 xo-ce xo-server[15087]:       at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 10:49:23 xo-ce xo-server[15087]:       at XapiStreamNbdSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist>
Apr 21 10:49:23 xo-ce xo-server[15087]:       at XapiStreamNbdSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiStrea>
Apr 21 10:49:23 xo-ce xo-server[15087]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 10:49:23 xo-ce xo-server[15087]:       at async #openNbdStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:108:>
Apr 21 10:49:23 xo-ce xo-server[15087]:     code: 'UND_ERR_ABORTED',
Apr 21 10:49:23 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR): true,
Apr 21 10:49:23 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 10:49:23 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 10:49:23 xo-ce xo-server[15087]:   }
Apr 21 10:49:23 xo-ce xo-server[15087]: }
Apr 21 10:49:28 xo-ce xo-server[15087]: 2026-04-21T14:49:28.301Z xo:xapi:xapi-disks INFO Error in openNbdCBT Error: CBT is disabled
Apr 21 10:49:28 xo-ce xo-server[15087]:     at XapiVhdCbtSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiVhdCbt.mjs>
Apr 21 10:49:28 xo-ce xo-server[15087]:     at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 10:49:28 xo-ce xo-server[15087]:     at async #openNbdCbt (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:222:7)
Apr 21 10:49:28 xo-ce xo-server[15087]:     at async XapiDiskSource.openSource (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi>
Apr 21 10:49:28 xo-ce xo-server[15087]:     at async XapiDiskSource.init (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/D>
Apr 21 10:49:28 xo-ce xo-server[15087]:     at async file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalVm.mjs:66:5
Apr 21 10:49:28 xo-ce xo-server[15087]:     at async Promise.all (index 0)
Apr 21 10:49:28 xo-ce xo-server[15087]:     at async cancelableMap (file:///opt/xen-orchestra/@xen-orchestra/backups/_cancelableMap.mjs:>
Apr 21 10:49:28 xo-ce xo-server[15087]:     at async exportIncrementalVm (file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalV>
Apr 21 10:49:28 xo-ce xo-server[15087]:     at async IncrementalXapiVmBackupRunner._copy (file:///opt/xen-orchestra/@xen-orchestra/backu>
Apr 21 10:49:28 xo-ce xo-server[15087]:   code: 'CBT_DISABLED'
Apr 21 10:49:28 xo-ce xo-server[15087]: }
Apr 21 10:49:28 xo-ce xo-server[15087]: 2026-04-21T14:49:28.303Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 10:51:36 xo-ce xo-server[15087]: 2026-04-21T14:51:36.752Z xo:backups:worker ERROR unhandled error event {
Apr 21 10:51:36 xo-ce xo-server[15087]:   error: RequestAbortedError [AbortError]: Request aborted
Apr 21 10:51:36 xo-ce xo-server[15087]:       at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 10:51:36 xo-ce xo-server[15087]:       at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 10:51:36 xo-ce xo-server[15087]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 10:51:36 xo-ce xo-server[15087]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 10:51:36 xo-ce xo-server[15087]:       at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 10:51:36 xo-ce xo-server[15087]:       at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 10:51:36 xo-ce xo-server[15087]:       at XapiStreamNbdSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist>
Apr 21 10:51:36 xo-ce xo-server[15087]:       at XapiStreamNbdSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiStrea>
Apr 21 10:51:36 xo-ce xo-server[15087]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 10:51:36 xo-ce xo-server[15087]:       at async #openNbdStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:108:>
Apr 21 10:51:36 xo-ce xo-server[15087]:     code: 'UND_ERR_ABORTED',
Apr 21 10:51:36 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR): true,
Apr 21 10:51:36 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 10:51:36 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 10:51:36 xo-ce xo-server[15087]:   }
Apr 21 10:51:36 xo-ce xo-server[15087]: }
Apr 21 10:54:43 xo-ce xo-server[15087]: 2026-04-21T14:54:43.246Z xo:xapi:vdi INFO  OpaqueRef:0dbee77e-fe9f-4185-b0a9-3061fbe88e91 has be>
Apr 21 10:54:43 xo-ce xo-server[15087]:   vdiRef: 'OpaqueRef:bedd4b03-b530-a222-e369-1647fa96cc92',
Apr 21 10:54:43 xo-ce xo-server[15087]:   vbdRef: 'OpaqueRef:0dbee77e-fe9f-4185-b0a9-3061fbe88e91'
Apr 21 10:54:43 xo-ce xo-server[15087]: }
Apr 21 10:54:43 xo-ce xo-server[15087]: 2026-04-21T14:54:43.248Z xo:xapi:xapi-disks WARN Either transmit the source to the constructor o>
Apr 21 10:54:43 xo-ce xo-server[15087]:   error: Error: Either transmit the source to the constructor or implement openSource and call i>
Apr 21 10:54:43 xo-ce xo-server[15087]:       at get source (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPassthroug>
Apr 21 10:54:43 xo-ce xo-server[15087]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 10:54:43 xo-ce xo-server[15087]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 10:54:43 xo-ce xo-server[15087]:       at #openExportStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:189:21)
Apr 21 10:54:43 xo-ce xo-server[15087]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 10:54:43 xo-ce xo-server[15087]:       at async #openNbdStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:97:2>
Apr 21 10:54:43 xo-ce xo-server[15087]:       at async XapiDiskSource.openSource (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xa>
Apr 21 10:54:43 xo-ce xo-server[15087]:       at async XapiDiskSource.init (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist>
Apr 21 10:54:43 xo-ce xo-server[15087]:       at async file:///opt/xen-orchestra/@xen-orchestra/backups/_incrementalVm.mjs:66:5
Apr 21 10:54:43 xo-ce xo-server[15087]:       at async Promise.all (index 0)
Apr 21 10:54:43 xo-ce xo-server[15087]: }
Apr 21 10:54:43 xo-ce xo-server[15087]: 2026-04-21T14:54:43.248Z xo:xapi:xapi-disks WARN can't compute delta OpaqueRef:bedd4b03-b530-a22>
Apr 21 10:54:43 xo-ce xo-server[15087]:   error: BodyTimeoutError: Body Timeout Error
Apr 21 10:54:43 xo-ce xo-server[15087]:       at FastTimer.onParserTimeout [as _onTimeout] (/opt/xen-orchestra/node_modules/undici/lib/d>
Apr 21 10:54:43 xo-ce xo-server[15087]:       at Timeout.onTick [as _onTimeout] (/opt/xen-orchestra/node_modules/undici/lib/util/timers.>
Apr 21 10:54:43 xo-ce xo-server[15087]:       at listOnTimeout (node:internal/timers:605:17)
Apr 21 10:54:43 xo-ce xo-server[15087]:       at process.processTimers (node:internal/timers:541:7) {
Apr 21 10:54:43 xo-ce xo-server[15087]:     code: 'UND_ERR_BODY_TIMEOUT',
Apr 21 10:54:43 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR): true,
Apr 21 10:54:43 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR_BODY_TIMEOUT): true
Apr 21 10:54:43 xo-ce xo-server[15087]:   }
Apr 21 10:54:43 xo-ce xo-server[15087]: }
Apr 21 10:54:43 xo-ce xo-server[15087]: 2026-04-21T14:54:43.254Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 10:54:50 xo-ce xo-server[15087]: 2026-04-21T14:54:50.896Z xo:backups:worker ERROR unhandled error event {
Apr 21 10:54:50 xo-ce xo-server[15087]:   error: RequestAbortedError [AbortError]: Request aborted
Apr 21 10:54:50 xo-ce xo-server[15087]:       at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 10:54:50 xo-ce xo-server[15087]:       at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 10:54:50 xo-ce xo-server[15087]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 10:54:50 xo-ce xo-server[15087]:       at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 10:54:50 xo-ce xo-server[15087]:       at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 10:54:50 xo-ce xo-server[15087]:       at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 10:54:50 xo-ce xo-server[15087]:       at XapiStreamNbdSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist>
Apr 21 10:54:50 xo-ce xo-server[15087]:       at XapiStreamNbdSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiStrea>
Apr 21 10:54:50 xo-ce xo-server[15087]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 10:54:50 xo-ce xo-server[15087]:       at async #openNbdStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:108:>
Apr 21 10:54:50 xo-ce xo-server[15087]:     code: 'UND_ERR_ABORTED',
Apr 21 10:54:50 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR): true,
Apr 21 10:54:50 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 10:54:50 xo-ce xo-server[15087]:     Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 10:54:50 xo-ce xo-server[15087]:   }
Apr 21 10:54:50 xo-ce xo-server[15087]: }
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