If the hypervisor driver has not yet created the network port, the portid field will be "00000000-0000-0000-0000-000000000000". If a failure occurs during early VM startup, the hypervisor driver may none the less try to release the network port, resulting in an undesirable warning: 2019-09-12 13:17:42.349+0000: 16544: error : virNetworkObjLookupPort:1679 : network port not found: Network port with UUID 00000000-0000-0000-0000-000000000000 does not exist By checking if the portid UUID is valid, we can avoid polluting the logs in this way. Signed-off-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- src/conf/domain_conf.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 3dc638f0de..b1f8a13319 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -30994,6 +30994,12 @@ virDomainNetReleaseActualDevice(virConnectPtr conn, virNetworkPortPtr port = NULL; int ret = -1; + /* Port might not exist if a failure occurred during VM startup */ + if (!virUUIDIsValid(iface->data.network.portid)) { + ret = 0; + goto cleanup; + } + if (!(net = virNetworkLookupByName(conn, iface->data.network.name))) goto cleanup; -- 2.21.0