when building the openvswitch in centos8, test suite executed in x86_64 builds are failing and taking very long to execute:

https://cbs.centos.org/kojifiles/work/tasks/9381/1119381/build.log

Extract from in ## Detailed failed tests. ## section


1. completion.at:21: testing appctl-bashcomp - basic verification ...
./completion.at:23: ovsdb-tool create conf.db $abs_top_srcdir/vswitchd/vswitch.ovsschema
./completion.at:23: ovsdb-server --detach --no-chdir --pidfile --log-file --remote=punix:$OVS_RUNDIR/db.sock
stderr:
2020-01-23T00:50:49Z|00001|vlog|INFO|opened log file /builddir/build/BUILD/openvswitch-2.12.0/tests/testsuite.dir/0001/ovsdb-server.log
./completion.at:23: sed < stderr '
/vlog|INFO|opened log file/d
/ovsdb_server|INFO|ovsdb-server (Open vSwitch)/d'
./completion.at:23: ovs-vsctl --no-wait init
./completion.at:23: ovs-vswitchd --enable-dummy --disable-system --disable-system-route --detach --no-chdir --pidfile --log-file -vvconn -vofproto_dpif -vunixctl
stderr:
2020-01-23T00:50:49Z|00001|vlog|INFO|opened log file /builddir/build/BUILD/openvswitch-2.12.0/tests/testsuite.dir/0001/ovs-vswitchd.log
2020-01-23T00:50:49Z|00002|ovs_numa|INFO|Discovered 16 CPU cores on NUMA node 0
2020-01-23T00:50:49Z|00003|ovs_numa|INFO|Discovered 16 CPU cores on NUMA node 1
2020-01-23T00:50:49Z|00004|ovs_numa|INFO|Discovered 2 NUMA nodes and 32 CPU cores
2020-01-23T00:50:49Z|00005|reconnect|INFO|unix:/builddir/build/BUILD/openvswitch-2.12.0/tests/testsuite.dir/0001/db.sock: connecting...
2020-01-23T00:50:49Z|00006|netlink_socket|INFO|netlink: could not enable listening to all nsid (Operation not permitted)
2020-01-23T00:50:49Z|00007|reconnect|INFO|unix:/builddir/build/BUILD/openvswitch-2.12.0/tests/testsuite.dir/0001/db.sock: connected
2020-01-23T00:50:49Z|00008|dpdk|INFO|DPDK Disabled - Use other_config:dpdk-init to enable
./completion.at:23: sed < stderr '
/ovs_numa|INFO|Discovered /d
/vlog|INFO|opened log file/d
/vswitchd|INFO|ovs-vswitchd (Open vSwitch)/d
/reconnect|INFO|/d
/dpif_netlink|INFO|Generic Netlink family .ovs_datapath. does not exist/d
/ofproto|INFO|using datapath ID/d
/netdev_linux|INFO|.*device has unknown hardware address family/d
/ofproto|INFO|datapath ID changed to fedcba9876543210/d
/dpdk|INFO|DPDK Disabled - Use other_config:dpdk-init to enable/d
/netlink_socket|INFO|netlink: could not enable listening to all nsid/d
/probe tc:/d
/tc: Using policy/d'
./completion.at:23: add_of_br 0
./completion.at:29:
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:29:
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:29:
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:29:
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:47:
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:55:
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:66: ovs-ofctl monitor br0 --detach --no-chdir --pidfile
./completion.at:67:
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:67:
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:67:
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:80: test -e $OVS_RUNDIR/ovs-ofctl.pid
./completion.at:80: ovs-appctl --timeout=10 -t ovs-ofctl exit
completion.at:80: waiting while kill -0 $TMPPID 2>/dev/null...
completion.at:80: wait failed after 10 seconds
./ovs-macros.at:241: hard failure
1. completion.at:21: 1. appctl-bashcomp - basic verification (completion.at:21): FAILED (ovs-macros.at:241)
# -*- compilation -*-

All failures seems to have similar pattern of timeout while trying to kill ovs process:

...
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:131: echo "$INPUT" | sed -e '/./,$!d'
./completion.at:135: check_logs
./completion.at:135: test -e $OVS_RUNDIR/ovs-vswitchd.pid
./completion.at:135: ovs-appctl --timeout=10 -t ovs-vswitchd exit --cleanup
completion.at:135: waiting while kill -0 $TMPPID 2>/dev/null...
completion.at:135: wait failed after 10 seconds
./ovs-macros.at:241: hard failure


......
echo "${INPUT}" | sed -e '1,/Available/d' | tail -n+2
./completion.at:165: echo "$INPUT" | sed -e '/./,$!d'
./completion.at:169: check_logs
./completion.at:169: test -e $OVS_RUNDIR/ovs-vswitchd.pid
./completion.at:169: ovs-appctl --timeout=10 -t ovs-vswitchd exit --cleanup
completion.at:169: waiting while kill -0 $TMPPID 2>/dev/null...
completion.at:169: wait failed after 10 seconds
./ovs-macros.at:241: hard failure


Note that this tests are actually launching ovs processes (are functional tests).