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    XCP-ng 8.3 updates announcements and testing

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    • rzrR Offline
      rzr Vates 🪐 XCP-ng Team
      last edited by rzr

      New feature, security and maintenance update candidates for you to test!

      This release batch contains a major storage feature,
      read the RC2 announcement for QCOW2 image format support for 2TiB+ images.

      The whole platform has been hardened with a major OpenSSH update.

      The updated Windows Guest Tools bring support for the XSTDVGA driver, allowing display resizing.

      We also publish other non-urgent updates which we had in the pipe for the next update release.

      What changed

      Storage

      QCOW2 image format support is the major feature of this release batch,
      check related announcement in forum.

      • sm: 3.2.12-17.2
        • Add support for the QCOW2 image format
      • blktap: 3.55.5-6.4
        • Add support of new QCOW2 disk type

      Maintenance updates

      Virtualization & System

      • xen: 4.17.6-6.1
        • Sync with XenServer's xen-4.17.6-6.xs8
          * Fix boot failure on some UEFI systems. WIP
      • kernel: 4.19.19-8.0.46.1
        • Fix regarding use of the correct MAC address in the rndis_host driver
        • Backport fix regarding a potential bug in the ext4 driver (CVE-2020-14314)
        • Backports fixes in SUNRPC (related to NFS). This prevents host crashes under some circumstances.

      Control plane

      • xapi: 26.1.3-1.6
        • Several fixes to QCOW2 enablement for importing and exporting, like reducing memory usage on disk import
      • xcp-ng-xapi-plugins: 1.16.0-1
        • sdncontroller.py: add support for new optional cookie argument to add-rule and del-rule functions
      • xcp-ng-pv-tools: 8.3-16
        • Update to XCP-ng Windows PV Tools 9.1.146.0
        • Include the XSTDVGA driver and improvements to the guest agent/installer

      UI

      • xo-lite: Update to 0.20.0-1
        • [VM/New] Added secureBoot support (PR #9423)
        • [Dashboard] Fix reactivity of dashboard (PR #9378)
        • [VM] Fixed duplicated ip addresses in the network tab Forum#101359 (PR #9547)
        • [Stats] Return null instead of 0 when no stats available (PR #9634)
        • [Treeview/Pool/Host] Add button to download bugtools (PR #9419)

      Network

      • gnutls: 3.3.29-10.2
        • Fix dane removal (no more replacing dane with devel package)
      • openssh: Update to 9.8p1-1.2.2
        • Deprecate old OpenSSH clients (7.2 and lower) that use weak SHA1 with ssh-rsa:
          • For now, a warning will ask to use an up to date client, on next update weak configurations will be rejected.
      • net-snmp: 5.9.3-8.2
        • Fix SNMP regression (daemon configuration was lost in earlier version)
      • xcp-ng-deps: 8.3-14
        • Install traceroute to troubleshoot connectivity problems

      Additional packages

      Best effort support is provided for additional packages provided by the XCP-ng project.

      • lldpd: version 1.0.4-1.1 provided for convenience in our repositories, as the EPEL version is not compatible anymore with the latest XCP-ng 8.3 updates. However, please prefer the pre-installed lldapd whenever possible.
      • nut: version 2.8.0-2.1 provided for convenience in our repositories, as the EPEL version is not compatible anymore with the latest XCP-ng updates.
        • User feedback is welcome

      Drivers updates

      More information about drivers and current versions is maintained on the drivers wiki page.

      • emulex-lpfc-alt: 14.4.393.31-1.1
        • This is an alternative driver which handles newer Emulex lpfc devices.
      • sfc-module-alt: 5.3.18.1012-1
        • Initial alternate driver for Solarflare SFN5XXX|6XXX|7XXX|8XXX|X2, version 5.3.18.1012

      Versions:

      • blktap: 3.55.5-6.3.xcpng8.3 -> 3.55.5-6.4.xcpng8.3
      • gnutls: 3.3.29-10.1.xcpng8.3 -> 3.3.29-10.2.xcpng8.3
      • kernel: 4.19.19-8.0.44.1.xcpng8.3 -> 4.19.19-8.0.46.1.xcpng8.3
      • net-snmp: 1:5.9.3-8.1.xcpng8.3 -> 1:5.9.3-8.2.xcpng8.3
      • openssh: 7.4p1-23.3.3.xcpng8.3 -> 9.8p1-1.2.2.xcpng8.3
      • sm: 3.2.12-17.1.xcpng8.3 -> 3.2.12-17.2.xcpng8.3
      • traceroute: 3:2.1.5-2.xcpng8.3
      • xapi: 26.1.3-1.3.xcpng8.3 -> 26.1.3-1.6.xcpng8.3
      • xcp-ng-deps: 8.3-13 -> 8.3-14
      • xcp-ng-pv-tools: 8.3-15.xcpng8.3 -> 8.3-16.xcpng8.3
      • xcp-ng-xapi-plugins: 1.15.0-1.xcpng8.3 -> 1.16.0-1.xcpng8.3
      • xen: 4.17.6-5.2.xcpng8.3 -> 4.17.6-6.1.xcpng8.3
      • xo-lite: 0.19.0-1.xcpng8.3 -> 0.20.0-1.xcpng8.3

      Optional packages:

      • lldpd: 1.0.4-1.1
      • nut: 2.8.0-2.1

      Test on XCP-ng 8.3

      If you are using XOSTOR, please refer to our documentation for the update method.

      yum clean metadata --enablerepo=xcp-ng-testing,xcp-ng-candidates
yum update --enablerepo=xcp-ng-testing,xcp-ng-candidates
reboot

      The usual update rules apply: pool coordinator first, etc.

      Known issues

      • On blktap update a non blocking error is reported,the fix is ongoing and will be delivered soon

      What to test

      The most important change is related to storage: adding QCOW2 support also affects the codebase managing VHD disks. What matters here is, above all, to detect any regression on VHD support (we tested it deeply, but on this matter there's no such thing as too much testing). Of course, you are also welcome to test the QCOW2 image format support.

      See the dedicated thread for more information.

      Other significant changes requiring attention:
      * SSH connectivity
      * SNMP, if you use it

      And, as usual, normal use and anything else you want to test.

      Test window before official release of the updates

      ~2 weeks

      dthenotD A 3 Replies Last reply Reply Quote 2
      • dthenotD Offline
        dthenot Vates 🪐 XCP-ng Team @rzr
        last edited by

        @rzr Host updated 🙂

        1 Reply Last reply Reply Quote 1
        • A Online
          Andrew Top contributor @rzr
          last edited by

          @rzr Installed on test machines with some warnings:

            Updating   : blktap-3.55.5-6.4.xcpng8.3.x86_64                           9/87
cat: /usr/lib/udev/rules.d/65-md-incremental.rules: No such file or directory
warning: %triggerin(blktap-3.55.5-6.4.xcpng8.3.x86_64) scriptlet failed, exit status 1
Non-fatal <unknown> scriptlet failure in rpm package blktap-3.55.5-6.4.xcpng8.3. x86_64

  Updating   : sm-fairlock-3.2.12-17.2.xcpng8.3.x86_64                    32/87
Warning: fairlock@devicemapper.service changed on disk. Run 'systemctl daemon-reload' to reload units.
          F rzrR 2 Replies Last reply Reply Quote 0
          • F Offline
            flakpyro @Andrew
            last edited by

            Installed on a handful of test machines. Not as many as usual as im being very cautious with this one for now. Everything rebooted and VMs started ok after. Using VHD for everything currently.

            1 Reply Last reply Reply Quote 2
            • rzrR Offline
              rzr Vates 🪐 XCP-ng Team @Andrew
              last edited by rzr

              @Andrew said:

              @rzr Installed on test machines with some warnings:

                Updating   : blktap-3.55.5-6.4.xcpng8.3.x86_64                           9/87
cat: /usr/lib/udev/rules.d/65-md-incremental.rules: No such file or directory
warning: %triggerin(blktap-3.55.5-6.4.xcpng8.3.x86_64) scriptlet failed, exit status 1
Non-fatal <unknown> scriptlet failure in rpm package blktap-3.55.5-6.4.xcpng8.3. x86_64

              Yes this was reported as "Known issues"

              On blktap update a non blocking error is reported,the fix is ongoing and will be delivered soon

                Updating   : sm-fairlock-3.2.12-17.2.xcpng8.3.x86_64                    32/87
Warning: fairlock@devicemapper.service changed on disk. Run 'systemctl daemon-reload' to reload units.

              I observed this too, maybe this should be documented too, a reboot will work too.

              A 1 Reply Last reply Reply Quote 0
              • rzrR rzr referenced this topic
              • A Online
                Andrew Top contributor @rzr
                last edited by

                @rzr Always a reboot after big updates, as instructed/required.

                1 Reply Last reply Reply Quote 2
                • B Offline
                  bufanda
                  last edited by

                  Upgraded my usual pool. VM migrations during reboot worked without issues. So far everything works

                  1 Reply Last reply Reply Quote 3
                  • J Offline
                    JeffBerntsen Top contributor
                    last edited by

                    Now installed on my test systems and all seems to be working so far.

                    1 Reply Last reply Reply Quote 1
                    • P Offline
                      ph7
                      last edited by

                      Tested but not much
                      Seems fine so far

                      1 Reply Last reply Reply Quote 0
                      • A Online
                        Andrew Top contributor @rzr
                        last edited by Andrew

                        @rzr (edit) After upgrading two main pools, I'm having CR delta backup issues. Everything was working before the XCP update, now every VM has the same error of Backup fell back to a full. Using XO master db9c4, but the same XO setup was working just fine before the XCP update.

                        (edit 2) XO logs

                        Apr 15 22:55:40 xo1 xo-server[1409]: 2026-04-16T02:55:40.613Z xo:backups:worker INFO starting backup
Apr 15 22:55:42 xo1 xo-server[1409]: 2026-04-16T02:55:42.006Z xo:xapi:xapi-disks INFO export through vhd
Apr 15 22:55:44 xo1 xo-server[1409]: 2026-04-16T02:55:44.093Z xo:xapi:vdi INFO  OpaqueRef:07ac67ab-05cf-a066-5924-f28e15642d4e was already destroyed {
Apr 15 22:55:44 xo1 xo-server[1409]:   vdiRef: 'OpaqueRef:49ff18d3-5c18-176c-4930-0163c6727c2b',
Apr 15 22:55:44 xo1 xo-server[1409]:   vbdRef: 'OpaqueRef:07ac67ab-05cf-a066-5924-f28e15642d4e'
Apr 15 22:55:44 xo1 xo-server[1409]: }
Apr 15 22:55:44 xo1 xo-server[1409]: 2026-04-16T02:55:44.839Z xo:xapi:vdi INFO  OpaqueRef:e5fa3d00-f629-6983-6ff2-841e9edacf82 has been disconnected from dom0 {
Apr 15 22:55:44 xo1 xo-server[1409]:   vdiRef: 'OpaqueRef:02f9ba92-1ee2-88eb-f660-a2cf3eeb287d',
Apr 15 22:55:44 xo1 xo-server[1409]:   vbdRef: 'OpaqueRef:e5fa3d00-f629-6983-6ff2-841e9edacf82'
Apr 15 22:55:44 xo1 xo-server[1409]: }
Apr 15 22:55:44 xo1 xo-server[1409]: 2026-04-16T02:55:44.910Z xo:xapi:vm WARN _assertHealthyVdiChain, could not fetch VDI {
Apr 15 22:55:44 xo1 xo-server[1409]:   error: XapiError: UUID_INVALID(VDI, 8f233bfc-9deb-4a06-aa07-0510de7496a1)
Apr 15 22:55:44 xo1 xo-server[1409]:       at XapiError.wrap (file:///opt/xo/xo-builds/xen-orchestra-202604151415/packages/xen-api/_XapiError.mjs:16:12)
Apr 15 22:55:44 xo1 xo-server[1409]:       at file:///opt/xo/xo-builds/xen-orchestra-202604151415/packages/xen-api/transports/json-rpc.mjs:38:21
Apr 15 22:55:44 xo1 xo-server[1409]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 15 22:55:44 xo1 xo-server[1409]:     code: 'UUID_INVALID',
Apr 15 22:55:44 xo1 xo-server[1409]:     params: [ 'VDI', '8f233bfc-9deb-4a06-aa07-0510de7496a1' ],
Apr 15 22:55:44 xo1 xo-server[1409]:     call: { duration: 3, method: 'VDI.get_by_uuid', params: [Array] },
Apr 15 22:55:44 xo1 xo-server[1409]:     url: undefined,
Apr 15 22:55:44 xo1 xo-server[1409]:     task: undefined
Apr 15 22:55:44 xo1 xo-server[1409]:   }
Apr 15 22:55:44 xo1 xo-server[1409]: }
Apr 15 22:55:46 xo1 xo-server[1409]: 2026-04-16T02:55:46.732Z xo:xapi:xapi-disks INFO Error in openNbdCBT XapiError: SR_BACKEND_FAILURE_460(, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated], )
Apr 15 22:55:46 xo1 xo-server[1409]:     at XapiError.wrap (file:///opt/xo/xo-builds/xen-orchestra-202604151415/packages/xen-api/_XapiError.mjs:16:12)
Apr 15 22:55:46 xo1 xo-server[1409]:     at default (file:///opt/xo/xo-builds/xen-orchestra-202604151415/packages/xen-api/_getTaskResult.mjs:13:29)
Apr 15 22:55:46 xo1 xo-server[1409]:     at Xapi._addRecordToCache (file:///opt/xo/xo-builds/xen-orchestra-202604151415/packages/xen-api/index.mjs:1078:24)
Apr 15 22:55:46 xo1 xo-server[1409]:     at file:///opt/xo/xo-builds/xen-orchestra-202604151415/packages/xen-api/index.mjs:1112:14
Apr 15 22:55:46 xo1 xo-server[1409]:     at Array.forEach (<anonymous>)
Apr 15 22:55:46 xo1 xo-server[1409]:     at Xapi._processEvents (file:///opt/xo/xo-builds/xen-orchestra-202604151415/packages/xen-api/index.mjs:1102:12)
Apr 15 22:55:46 xo1 xo-server[1409]:     at Xapi._watchEvents (file:///opt/xo/xo-builds/xen-orchestra-202604151415/packages/xen-api/index.mjs:1275:14)
Apr 15 22:55:46 xo1 xo-server[1409]:     at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 15 22:55:46 xo1 xo-server[1409]:   code: 'SR_BACKEND_FAILURE_460',
Apr 15 22:55:46 xo1 xo-server[1409]:   params: [
Apr 15 22:55:46 xo1 xo-server[1409]:     '',
Apr 15 22:55:46 xo1 xo-server[1409]:     'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]',
Apr 15 22:55:46 xo1 xo-server[1409]:     ''
Apr 15 22:55:46 xo1 xo-server[1409]:   ],
Apr 15 22:55:46 xo1 xo-server[1409]:   call: undefined,
Apr 15 22:55:46 xo1 xo-server[1409]:   url: undefined,
Apr 15 22:55:46 xo1 xo-server[1409]:   task: task {
Apr 15 22:55:46 xo1 xo-server[1409]:     uuid: '8fae41b4-de82-789c-980a-5ff2d490d2d8',
Apr 15 22:55:46 xo1 xo-server[1409]:     name_label: 'Async.VDI.list_changed_blocks',
Apr 15 22:55:46 xo1 xo-server[1409]:     name_description: '',
Apr 15 22:55:46 xo1 xo-server[1409]:     allowed_operations: [],
Apr 15 22:55:46 xo1 xo-server[1409]:     current_operations: {},
Apr 15 22:55:46 xo1 xo-server[1409]:     created: '20260416T02:55:46Z',
Apr 15 22:55:46 xo1 xo-server[1409]:     finished: '20260416T02:55:46Z',
Apr 15 22:55:46 xo1 xo-server[1409]:     status: 'failure',
Apr 15 22:55:46 xo1 xo-server[1409]:     resident_on: 'OpaqueRef:7b987b11-ada0-99ce-d831-6e589bf34b50',
Apr 15 22:55:46 xo1 xo-server[1409]:     progress: 1,
Apr 15 22:55:46 xo1 xo-server[1409]:     type: '<none/>',
Apr 15 22:55:46 xo1 xo-server[1409]:     result: '',
Apr 15 22:55:46 xo1 xo-server[1409]:     error_info: [
Apr 15 22:55:46 xo1 xo-server[1409]:       'SR_BACKEND_FAILURE_460',
Apr 15 22:55:46 xo1 xo-server[1409]:       '',
Apr 15 22:55:46 xo1 xo-server[1409]:       'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]',
Apr 15 22:55:46 xo1 xo-server[1409]:       ''
Apr 15 22:55:46 xo1 xo-server[1409]:     ],
Apr 15 22:55:46 xo1 xo-server[1409]:     other_config: {},
Apr 15 22:55:46 xo1 xo-server[1409]:     subtask_of: 'OpaqueRef:NULL',
Apr 15 22:55:46 xo1 xo-server[1409]:     subtasks: [],
Apr 15 22:55:46 xo1 xo-server[1409]:     backtrace: '(((process xapi)(filename lib/backtrace.ml)(line 210))((process xapi)(filename ocaml/xapi/storage_utils.ml)(line 150))((process xapi)(filename ocaml/xapi/message_forwarding.ml)(line 141))((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/rbac.ml)(line 228))((process xapi)(filename ocaml/xapi/rbac.ml)(line 238))((process xapi)(filename ocaml/xapi/server_helpers.ml)(line 78)))'
Apr 15 22:55:46 xo1 xo-server[1409]:   }
Apr 15 22:55:46 xo1 xo-server[1409]: }
Apr 15 22:55:46 xo1 xo-server[1409]: 2026-04-16T02:55:46.735Z xo:xapi:xapi-disks INFO export through vhd
Apr 15 22:55:48 xo1 xo-server[1409]: 2026-04-16T02:55:48.115Z xo:xapi:vdi WARN invalid HTTP header in response body {
Apr 15 22:55:48 xo1 xo-server[1409]:   body: 'HTTP/1.1 500 Internal Error\r\n' +
Apr 15 22:55:48 xo1 xo-server[1409]:     'content-length: 318\r\n' +
Apr 15 22:55:48 xo1 xo-server[1409]:     'content-type: text/html\r\n' +
Apr 15 22:55:48 xo1 xo-server[1409]:     'connection: close\r\n' +
Apr 15 22:55:48 xo1 xo-server[1409]:     'cache-control: no-cache, no-store\r\n' +
Apr 15 22:55:48 xo1 xo-server[1409]:     '\r\n' +
Apr 15 22:55:48 xo1 xo-server[1409]:     '<html><body><h1>HTTP 500 internal server error</h1>An unexpected error occurred; please wait a while and try again. If the problem persists, please contact your support representative.<h1> Additional information </h1>VDI_INCOMPATIBLE_TYPE: [ OpaqueRef:3b37047e-11dd-f836-ebed-acfaff2072ac; CBT metadata ]</body></html>'
Apr 15 22:55:48 xo1 xo-server[1409]: }
Apr 15 22:55:48 xo1 xo-server[1409]: 2026-04-16T02:55:48.124Z xo:xapi:xapi-disks WARN can't compute delta OpaqueRef:e7de1446-34fd-1ae8-4680-351b1e72b2dd from OpaqueRef:3b37047e-11dd-f836-ebed-acfaff2072ac, fallBack to a full {
Apr 15 22:55:48 xo1 xo-server[1409]:   error: Error: invalid HTTP header in response body
Apr 15 22:55:48 xo1 xo-server[1409]:       at checkVdiExport (file:///opt/xo/xo-builds/xen-orchestra-202604151415/@xen-orchestra/xapi/vdi.mjs:37:19)
Apr 15 22:55:48 xo1 xo-server[1409]:       at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 15 22:55:48 xo1 xo-server[1409]:       at async Xapi.exportContent (file:///opt/xo/xo-builds/xen-orchestra-202604151415/@xen-orchestra/xapi/vdi.mjs:261:5)
Apr 15 22:55:48 xo1 xo-server[1409]:       at async #getExportStream (file:///opt/xo/xo-builds/xen-orchestra-202604151415/@xen-orchestra/xapi/disks/XapiVhdStreamSource.mjs:123:20)
Apr 15 22:55:48 xo1 xo-server[1409]:       at async XapiVhdStreamSource.init (file:///opt/xo/xo-builds/xen-orchestra-202604151415/@xen-orchestra/xapi/disks/XapiVhdStreamSource.mjs:135:23)
Apr 15 22:55:48 xo1 xo-server[1409]:       at async #openExportStream (file:///opt/xo/xo-builds/xen-orchestra-202604151415/@xen-orchestra/xapi/disks/Xapi.mjs:182:7)
Apr 15 22:55:48 xo1 xo-server[1409]:       at async #openNbdStream (file:///opt/xo/xo-builds/xen-orchestra-202604151415/@xen-orchestra/xapi/disks/Xapi.mjs:97:22)
Apr 15 22:55:48 xo1 xo-server[1409]:       at async XapiDiskSource.openSource (file:///opt/xo/xo-builds/xen-orchestra-202604151415/@xen-orchestra/xapi/disks/Xapi.mjs:258:18)
Apr 15 22:55:48 xo1 xo-server[1409]:       at async XapiDiskSource.init (file:///opt/xo/xo-builds/xen-orchestra-202604151415/@xen-orchestra/disk-transform/dist/DiskPassthrough.mjs:28:41)
Apr 15 22:55:48 xo1 xo-server[1409]:       at async file:///opt/xo/xo-builds/xen-orchestra-202604151415/@xen-orchestra/backups/_incrementalVm.mjs:66:5
Apr 15 22:55:48 xo1 xo-server[1409]: }
Apr 15 22:55:48 xo1 xo-server[1409]: 2026-04-16T02:55:48.126Z xo:xapi:xapi-disks INFO export through vhd
Apr 15 22:56:24 xo1 xo-server[1409]: 2026-04-16T02:56:24.047Z xo:backups:worker INFO backup has ended
Apr 15 22:56:24 xo1 xo-server[1409]: 2026-04-16T02:56:24.231Z xo:backups:worker INFO process will exit {
Apr 15 22:56:24 xo1 xo-server[1409]:   duration: 43618102,
Apr 15 22:56:24 xo1 xo-server[1409]:   exitCode: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:   resourceUsage: {
Apr 15 22:56:24 xo1 xo-server[1409]:     userCPUTime: 45307253,
Apr 15 22:56:24 xo1 xo-server[1409]:     systemCPUTime: 6674413,
Apr 15 22:56:24 xo1 xo-server[1409]:     maxRSS: 30928,
Apr 15 22:56:24 xo1 xo-server[1409]:     sharedMemorySize: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     unsharedDataSize: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     unsharedStackSize: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     minorPageFault: 287968,
Apr 15 22:56:24 xo1 xo-server[1409]:     majorPageFault: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     swappedOut: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     fsRead: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     fsWrite: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     ipcSent: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     ipcReceived: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     signalsCount: 0,
Apr 15 22:56:24 xo1 xo-server[1409]:     voluntaryContextSwitches: 14665,
Apr 15 22:56:24 xo1 xo-server[1409]:     involuntaryContextSwitches: 962
Apr 15 22:56:24 xo1 xo-server[1409]:   },
Apr 15 22:56:24 xo1 xo-server[1409]:   summary: { duration: '44s', cpuUsage: '119%', memoryUsage: '30.2 MiB' }
Apr 15 22:56:24 xo1 xo-server[1409]: }
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