[ovs-discuss] Inactivity Probe configuration not taking effect in OVS 2.14.0

[Saurabh Deokate]

Hi Team,

We are seeing an issue in OVS 2.14.0 after moving from 2.8.0. We first set the controller on the bridge and then set inactivity probe for our controller to 0 to disable new connection attempts by ovs. After this we start our controller to serve request. But in the new version of OVS somehow we still see inactivity probe kicking in after every 5s and trying to reconnect. This issue is triggered when we are in the middle of handling a packet in our controller (i.e. OFController) which is blocked for almost 40s.


Kernel version: CentOS Linux release 7.9.2009
Output of ovs-vsctl list controller command shows inactivity_probe: 0

Below is the snippet from ovs-vswitchd.log

021-05-11T22:32:55.378Z|00608|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connected
2021-05-11T22:33:05.382Z|00609|connmgr|INFO|br0.uvms<->tcp:127.0.0.1:6653: 44 flow_mods 10 s ago (44 adds)
2021-05-11T22:33:05.386Z|00610|rconn|ERR|br0.uvms<->tcp:127.0.0.1:6653: no response to inactivity probe after 5 seconds, disconnecting
2021-05-11T22:33:06.406Z|00611|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connecting...
2021-05-11T22:33:06.438Z|00612|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connected
2021-05-11T22:33:16.438Z|00613|rconn|ERR|br0.uvms<->tcp:127.0.0.1:6653: no response to inactivity probe after 5 seconds, disconnecting
2021-05-11T22:33:17.921Z|00614|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connecting...
2021-05-11T22:33:18.108Z|00615|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connected
2021-05-11T22:33:28.110Z|00616|rconn|ERR|br0.uvms<->tcp:127.0.0.1:6653: no response to inactivity probe after 5 seconds, disconnecting
2021-05-11T22:33:29.433Z|00617|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connecting...
2021-05-11T22:33:29.933Z|00618|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connected


Can you please help us find out what could be wrong with this configuration and what is the expected behaviour from ovs switch when the receiver on the controller is blocked for long.

Thanks,
Saurabh.

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