[Bug 2024584] [NEW] Openvswitch using DPDK crashes when pinging unreachable destinations

[Giuseppe Petralia]

Public bug reported:

We identified an issue which causes frequent network interruptions for
workloads due to ovs-vswitchd crashing.

The issue is the one described on [1] [2].

Essentially when using DPDK on OVS on top of OVN, if a VM tries
repeatedly to reach out to an unreachable IP, an assertion triggers on
ovs-vswitchd:

Jun 07 09:38:08 hostname ovs-vswitchd[2740305]:
ovs|00002|util(pmd-c11/id:7)|EMER|../lib/conntrack.c:1095: assertion
conn->conn_type == CT_CONN_TYPE_DEFAULT failed in conn_update_state()


OpenvSwitch version is 

# dpkg -l | grep openvswitch
ii  openvswitch-common                    2.17.5-0ubuntu0.22.04.2                              amd64        Open vSwitch common components
ii  openvswitch-switch                    2.17.5-0ubuntu0.22.04.2                              amd64        Open vSwitch switch implementations
ii  openvswitch-switch-dpdk               2.17.5-0ubuntu0.22.04.2                              amd64        DPDK enabled Open vSwitch switch implementation
ii  python3-openvswitch                   2.17.5-0ubuntu0.22.04.2                              all          Python 3 bindings for Open vSwitch


Links:
[1] https://www.mail-archive.com/ovs-discuss@openvswitch.org/msg08945.html
[2] https://patchwork.ozlabs.org/project/openvswitch/list/?series=351579&state=*

** Affects: openvswitch (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2024584

Title:
  Openvswitch using DPDK crashes when pinging unreachable destinations

Status in openvswitch package in Ubuntu:
  New

Bug description:
  We identified an issue which causes frequent network interruptions for
  workloads due to ovs-vswitchd crashing.

  The issue is the one described on [1] [2].

  Essentially when using DPDK on OVS on top of OVN, if a VM tries
  repeatedly to reach out to an unreachable IP, an assertion triggers on
  ovs-vswitchd:

  Jun 07 09:38:08 hostname ovs-vswitchd[2740305]:
  ovs|00002|util(pmd-c11/id:7)|EMER|../lib/conntrack.c:1095: assertion
  conn->conn_type == CT_CONN_TYPE_DEFAULT failed in conn_update_state()

  
  OpenvSwitch version is 

  # dpkg -l | grep openvswitch
  ii  openvswitch-common                    2.17.5-0ubuntu0.22.04.2                              amd64        Open vSwitch common components
  ii  openvswitch-switch                    2.17.5-0ubuntu0.22.04.2                              amd64        Open vSwitch switch implementations
  ii  openvswitch-switch-dpdk               2.17.5-0ubuntu0.22.04.2                              amd64        DPDK enabled Open vSwitch switch implementation
  ii  python3-openvswitch                   2.17.5-0ubuntu0.22.04.2                              all          Python 3 bindings for Open vSwitch

  
  Links:
  [1] https://www.mail-archive.com/ovs-discuss@openvswitch.org/msg08945.html
  [2] https://patchwork.ozlabs.org/project/openvswitch/list/?series=351579&state=*

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