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  1. Fast Datapath Product
  2. FDP-2756

Northd segmentation fault after bumping ovn to 25.09 in OCP

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    • Resolution: Unresolved
    • Icon: Major Major
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    • OVN
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    • Northd segmentation fault after bumping ovn to 25.09 in OCP
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      Please mark each item below with ( / ) if completed or ( x ) if incomplete:

      ( ) The acceptance criteria defined below are met.

      Given an OCP CI run that deploys UDN resources and distributed gateway ports on OVN 25.09,

      When ovn-northd processes the snapshot and drives the multicast engine through a full recompute,

      Then northd remains running without SIGSEGV and the SB DB continues to advance.

      ( ) The epics work is available in a downstream build (nightly/Async or other)

      ( ) All cards under the epic have been moved to Done

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      Please mark each item below with ( / ) if completed or ( x ) if incomplete: ( ) The acceptance criteria defined below are met. Given an OCP CI run that deploys UDN resources and distributed gateway ports on OVN 25.09, When ovn-northd processes the snapshot and drives the multicast engine through a full recompute, Then northd remains running without SIGSEGV and the SB DB continues to advance. ( ) The epics work is available in a downstream build (nightly/Async or other) ( ) All cards under the epic have been moved to Done
    • rhel-9
    • rhel-net-ovn
    • 67% To Do, 33% In Progress, 0% Done
    • ssg_networking

      This epic tracks all the effort needed to deliver the solution related to the bug described below.
      In a dual-stack CI run we see that northd is sefaulting on some nodes:

       

      2025-11-27T21:23:38.855271015Z /ovnkube-lib/ovnkube-lib.sh: line 97: 470965 Segmentation fault      (core dumped) exec ovn-northd --no-chdir -vconsole:"${log_level}" -vfile:off -vPATTERN:console:"%D{%Y-%m-%dT%H:%M:%S.###Z}|%05N|%c%T|%p|%m" --pidfile ${northd_pidfile} --n-threads=1

       

      ovn: 25.09.0-25.el9fdp

      must-gather: https://gcsweb-ci.apps.ci.l2s4.p1.openshiftapps.com/gcs/test-platform-results/pr-logs/pull/openshift_ovn-kubernetes/2863/pull-ci-openshift-ovn-kubernetes-master-e2e-metal-ipi-ovn-dualstack/1994092737644728320/artifacts/e2e-metal-ipi-ovn-dualstack/gather-must-gather/artifacts/must-gather.tar

              ovnteam@redhat.com OVN Team
              pdiak@redhat.com Patryk Diak
              OVN QE OVN QE
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                Created:
                Updated: