Confirm commit 1a7b5 backups completed successfully.

Last night 2 of my vms failed to complete a delta backup. As the tasks could not be cancled in any way i rebooted XO (built from sources) the task still show "runing" so i restarted the tool stack on host 1 and the tasks cleared. I attempted to restart failed backups and again the backup just hangs. It create the snapshot but never transfer data. The Remote is the same location as the nfs storage the vms are running from. So i know the Storage is good.

A few more rebooted of XO and tool stack. I rebooted both host and each time backups get stuck. If i try to start a new backup (same job) all vms hang. I tried to run a full delta backup and same. I tried to update XO but I am on current master build as of today (6b263) I tried to do a force update and still backup never completes.

I built a new VM for XO and installed from sources and still fail.

Here is one of the logs from the backups...

{
  "data": {
    "mode": "delta",
    "reportWhen": "always",
    "hideSuccessfulItems": true
  },
  "id": "1750503695411",
  "jobId": "95ac8089-69f3-404e-b902-21d0e878eec2",
  "jobName": "Backup Job 1",
  "message": "backup",
  "scheduleId": "76989b41-8bcf-4438-833a-84ae80125367",
  "start": 1750503695411,
  "status": "failure",
  "infos": [
    {
      "data": {
        "vms": [
          "b25a5709-f1f8-e942-f0cc-f443eb9b9cf3",
          "3446772a-4110-7a2c-db35-286c73af4ab4",
          "bce2b7f4-d602-5cdf-b275-da9554be61d3",
          "e0a3093a-52fd-f8dc-1c39-075eeb9d0314",
          "afbef202-af84-7e64-100a-e8a4c40d5130"
        ]
      },
      "message": "vms"
    }
  ],
  "tasks": [
    {
      "data": {
        "type": "VM",
        "id": "b25a5709-f1f8-e942-f0cc-f443eb9b9cf3",
        "name_label": "SeedBox"
      },
      "id": "1750503696510",
      "message": "backup VM",
      "start": 1750503696510,
      "status": "interrupted",
      "tasks": [
        {
          "id": "1750503696519",
          "message": "clean-vm",
          "start": 1750503696519,
          "status": "success",
          "end": 1750503696822,
          "result": {
            "merge": false
          }
        },
        {
          "id": "1750503697911",
          "message": "snapshot",
          "start": 1750503697911,
          "status": "success",
          "end": 1750503699564,
          "result": "6e2edbe9-d4bd-fd23-28b9-db4b03219e96"
        },
        {
          "data": {
            "id": "1575a1d8-3f87-4160-94fc-b9695c3684ac",
            "isFull": false,
            "type": "remote"
          },
          "id": "1750503699564:0",
          "message": "export",
          "start": 1750503699564,
          "status": "success",
          "tasks": [
            {
              "id": "1750503701979",
              "message": "clean-vm",
              "start": 1750503701979,
              "status": "success",
              "end": 1750503702141,
              "result": {
                "merge": false
              }
            }
          ],
          "end": 1750503702142
        }
      ],
      "warnings": [
        {
          "data": {
            "attempt": 1,
            "error": "invalid HTTP header in response body"
          },
          "message": "Retry the VM backup due to an error"
        }
      ]
    },
    {
      "data": {
        "type": "VM",
        "id": "3446772a-4110-7a2c-db35-286c73af4ab4",
        "name_label": "XO"
      },
      "id": "1750503696512",
      "message": "backup VM",
      "start": 1750503696512,
      "status": "interrupted",
      "tasks": [
        {
          "id": "1750503696518",
          "message": "clean-vm",
          "start": 1750503696518,
          "status": "success",
          "end": 1750503696693,
          "result": {
            "merge": false
          }
        },
        {
          "id": "1750503712472",
          "message": "snapshot",
          "start": 1750503712472,
          "status": "success",
          "end": 1750503713915,
          "result": "a1bdef52-142c-5996-6a49-169ef390aa2e"
        },
        {
          "data": {
            "id": "1575a1d8-3f87-4160-94fc-b9695c3684ac",
            "isFull": false,
            "type": "remote"
          },
          "id": "1750503713915:0",
          "message": "export",
          "start": 1750503713915,
          "status": "success",
          "tasks": [
            {
              "id": "1750503716280",
              "message": "clean-vm",
              "start": 1750503716280,
              "status": "success",
              "end": 1750503716383,
              "result": {
                "merge": false
              }
            }
          ],
          "end": 1750503716385
        }
      ],
      "warnings": [
        {
          "data": {
            "attempt": 1,
            "error": "invalid HTTP header in response body"
          },
          "message": "Retry the VM backup due to an error"
        }
      ]
    },
    {
      "data": {
        "type": "VM",
        "id": "bce2b7f4-d602-5cdf-b275-da9554be61d3",
        "name_label": "iVentoy"
      },
      "id": "1750503702145",
      "message": "backup VM",
      "start": 1750503702145,
      "status": "interrupted",
      "tasks": [
        {
          "id": "1750503702148",
          "message": "clean-vm",
          "start": 1750503702148,
          "status": "success",
          "end": 1750503702233,
          "result": {
            "merge": false
          }
        },
        {
          "id": "1750503702532",
          "message": "snapshot",
          "start": 1750503702532,
          "status": "success",
          "end": 1750503704850,
          "result": "05c5365e-3bc5-4640-9b29-0684ffe6d601"
        },
        {
          "data": {
            "id": "1575a1d8-3f87-4160-94fc-b9695c3684ac",
            "isFull": false,
            "type": "remote"
          },
          "id": "1750503704850:0",
          "message": "export",
          "start": 1750503704850,
          "status": "interrupted",
          "tasks": [
            {
              "id": "1750503706813",
              "message": "transfer",
              "start": 1750503706813,
              "status": "interrupted"
            }
          ]
        }
      ],
      "infos": [
        {
          "message": "Transfer data using NBD"
        }
      ]
    },
    {
      "data": {
        "type": "VM",
        "id": "e0a3093a-52fd-f8dc-1c39-075eeb9d0314",
        "name_label": "Docker of Things"
      },
      "id": "1750503716389",
      "message": "backup VM",
      "start": 1750503716389,
      "status": "interrupted",
      "tasks": [
        {
          "id": "1750503716395",
          "message": "clean-vm",
          "start": 1750503716395,
          "status": "success",
          "warnings": [
            {
              "data": {
                "path": "/xo-vm-backups/e0a3093a-52fd-f8dc-1c39-075eeb9d0314/20250604T160135Z.json",
                "actual": 6064872448,
                "expected": 6064872960
              },
              "message": "cleanVm: incorrect backup size in metadata"
            }
          ],
          "end": 1750503716886,
          "result": {
            "merge": false
          }
        },
        {
          "id": "1750503717182",
          "message": "snapshot",
          "start": 1750503717182,
          "status": "success",
          "end": 1750503719640,
          "result": "9effb56d-68e6-8015-6bd5-64fa65acbada"
        },
        {
          "data": {
            "id": "1575a1d8-3f87-4160-94fc-b9695c3684ac",
            "isFull": false,
            "type": "remote"
          },
          "id": "1750503719640:0",
          "message": "export",
          "start": 1750503719640,
          "status": "interrupted",
          "tasks": [
            {
              "id": "1750503721601",
              "message": "transfer",
              "start": 1750503721601,
              "status": "interrupted"
            }
          ]
        }
      ],
      "infos": [
        {
          "message": "Transfer data using NBD"
        }
      ]
    }
  ],
  "end": 1750504870213,
  "result": {
    "message": "worker exited with code null and signal SIGTERM",
    "name": "Error",
    "stack": "Error: worker exited with code null and signal SIGTERM\n    at ChildProcess.<anonymous> (file:///opt/xo/xo-builds/xen-orchestra-202506202218/@xen-orchestra/backups/runBackupWorker.mjs:24:48)\n    at ChildProcess.emit (node:events:518:28)\n    at ChildProcess.patchedEmit [as emit] (/opt/xo/xo-builds/xen-orchestra-202506202218/@xen-orchestra/log/configure.js:52:17)\n    at Process.ChildProcess._handle.onexit (node:internal/child_process:293:12)\n    at Process.callbackTrampoline (node:internal/async_hooks:130:17)"
  }
}

Thank you for the update. Last night before I saw your replys that is exactly what i did. I purged the backup's for the two VMs from BackBlaze. The backup job completed successfully while copying over the previous backup images.

@olivierlambert

Got it working. With some help in another forum a user helped. Added the following line in the advanced tap for the proxy host.

client_max_body_size 0;

I thought i have uploaded ISOs previously with no issues before but i may have been mistaken and have uploaded other ways for other reasons.