[Bug 1990978] [NEW] Raft bug: OVSDB leadership transfers every 10-20 min after initial compaction

[Alin-Gabriel Serdean]

Public bug reported:

First compaction starts after 24 hours, or earlier after doubling of DB
size.

Subsequent compactions will trigger every 10-20 min.

The OVS version hitting this issue:
ovs-vsctl (Open vSwitch) 2.17.2

Commit ID that fixes the issue is: https://github.com/openvswitch/ovs/commit/a32a4e1fa2d3fad284834d4b7bccc2e71d33f9da
https://github.com/openvswitch/ovs/commit/dfc3e65c8191f5dc375337c23aed128b5c0d7781(2.17 branch patch)

Testcase:
Trigger compactions by using command line tool:
ovs-appctl -t /var/run/ovn/ovnsb_db.ctl ovsdb-server/compact
Check for leadership transfers using:
sudo grep "Transferring leadership" /var/log/ovn/ov* | grep ovsdb-server-sb.log
There should be a new entry every 10-20min.

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

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https://bugs.launchpad.net/bugs/1990978

Title:
  Raft bug: OVSDB leadership transfers every 10-20 min after initial
  compaction

Status in openvswitch package in Ubuntu:
  New

Bug description:
  First compaction starts after 24 hours, or earlier after doubling of
  DB size.

  Subsequent compactions will trigger every 10-20 min.

  The OVS version hitting this issue:
  ovs-vsctl (Open vSwitch) 2.17.2

  Commit ID that fixes the issue is: https://github.com/openvswitch/ovs/commit/a32a4e1fa2d3fad284834d4b7bccc2e71d33f9da
  https://github.com/openvswitch/ovs/commit/dfc3e65c8191f5dc375337c23aed128b5c0d7781(2.17 branch patch)

  Testcase:
  Trigger compactions by using command line tool:
  ovs-appctl -t /var/run/ovn/ovnsb_db.ctl ovsdb-server/compact
  Check for leadership transfers using:
  sudo grep "Transferring leadership" /var/log/ovn/ov* | grep ovsdb-server-sb.log
  There should be a new entry every 10-20min.

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