On Wed, Dec 05, 2018 at 12:11:28PM +1300, Josh Bailey via discuss wrote:
> Hello OVS colleagues,
> 
> vswitchd appears to crash handling a port add/mod. Please see following to
> reproduce.
> 
> Run two Ryu OF controllers:
> 
> $ ryu-manager --ofp-tcp-listen-port 6653  --ofp-listen-host 127.0.0.1
> --verbose --app-lists ryu.app.simple_switch_stp
> 
> $ ryu-manager --ofp-tcp-listen-port 6654  --ofp-listen-host 127.0.0.1
> --verbose --app-lists ryu.app.simple_switch_stp
> 
> 
> Now set up a bridge with no interfaces:
> 
> 
> root@faucet:~/faucet# /usr/local/share/openvswitch/scripts/ovs-ctl start
> * Starting ovsdb-server
> * system ID not configured, please use --system-id
> * Configuring Open vSwitch system IDs
> * Starting ovs-vswitchd
> * Enabling remote OVSDB managers
> root@faucet:~/faucet# ovs-vsctl --version
> ovs-vsctl (Open vSwitch) 2.9.3
> DB Schema 7.15.1
> root@faucet:~/faucet# ovs-vsctl add-br br0
> root@faucet:~/faucet# ovs-vsctl set-controller br0 tcp:127.0.0.1:6653 tcp:
> 127.0.0.1:6654
> 
> 
> Now add a physical interface known to be up:
> 
> 
> root@faucet:~/faucet# ovs-vsctl add-port br0 enp2s0f0
> 
> 
> Observe crash in log:
> 
> 
> 2018-12-04T23:03:06.663Z|00036|bridge|INFO|bridge br0: added interface
> enp2s0f0 on port 1
> 2018-12-04T23:03:06.663Z|00037|bridge|INFO|bridge br0: using datapath ID
> 000090e2ba7e7558
> 2018-12-04T23:03:06.663Z|00038|rconn|INFO|br0<->tcp:127.0.0.1:6653:
> disconnecting
> 2018-12-04T23:03:06.663Z|00039|rconn|INFO|br0<->tcp:127.0.0.1:6654:
> disconnecting
> 2018-12-04T23:03:06.664Z|00040|fail_open|WARN|Could not connect to
> controller (or switch failed controller's post-connection admission control
> policy) for 19 seconds, failing open
> 2018-12-04T23:03:06.710Z|00002|daemon_unix(monitor)|ERR|1 crashes: pid 5620
> died, killed (Aborted), core dumped, restarting

Please open the coredump using gdb and provide the backtrace at least,
Thanks,
-- 
fbl

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