switch DumpFlowStats error: Unsupported match field

[gotostack]

We have these OVS flows:

 cookie=0x0, duration=201.184s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=200,ip,in_port=9,dl_vlan=273,dl_dst=fa:16:3e:01:dd:2c,nw_src=169.254.169.254 actions=pop_vlan,output:119
 cookie=0x0, duration=201.184s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=200,ip,in_port=9,dl_vlan=273,dl_dst=fa:16:3e:53:93:6c,nw_src=169.254.169.254 actions=pop_vlan,output:30
 cookie=0x0, duration=201.184s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=200,ip,in_port=9,dl_vlan=273,dl_dst=fa:16:3e:1d:ad:66,nw_src=169.254.169.254 actions=pop_vlan,output:35
 cookie=0x0, duration=201.183s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,arp,dl_vlan=273,arp_tpa=10.20.20.113 actions=pop_vlan,output:113
 cookie=0x0, duration=201.183s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,arp,dl_vlan=273,arp_tpa=10.10.10.108 actions=pop_vlan,output:26
 cookie=0x0, duration=201.183s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,arp,dl_vlan=272,arp_tpa=10.30.30.133 actions=pop_vlan,output:35
 cookie=0x0, duration=201.183s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,icmp6,dl_vlan=273,dl_dst=fa:16:3e:3d:bd:61,icmp_type=133 actions=pop_vlan,output:17
 cookie=0x0, duration=201.183s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,icmp6,dl_vlan=273,dl_dst=fa:16:3e:3d:bd:61,icmp_type=134 actions=pop_vlan,output:17
 cookie=0x0, duration=201.183s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,icmp6,dl_vlan=273,dl_dst=fa:16:3e:3d:bd:61,icmp_type=136 actions=pop_vlan,output:17
 cookie=0x0, duration=201.183s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,icmp6,dl_vlan=273,dl_dst=fa:16:3e:3d:bd:61,icmp_type=137 actions=pop_vlan,output:17
 cookie=0x0, duration=201.182s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,icmp6,dl_vlan=273,icmp_type=135,nd_target=2024:329:1111::1ab actions=pop_vlan,output:115
 cookie=0x0, duration=201.182s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,icmp6,dl_vlan=273,icmp_type=135,nd_target=fe80::302:3ff:fe04:506 actions=pop_vlan,output:33
 cookie=0x0, duration=201.182s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,icmp6,dl_vlan=273,icmp_type=135,nd_target=1111:2222::295 actions=pop_vlan,output:31
 cookie=0x0, duration=201.182s, table=0, n_packets=0, n_bytes=0, idle_age=201, priority=100,icmp6,dl_vlan=273,icmp_type=135,nd_target=fe80::f816:3eff:fe35:9748 actions=pop_vlan,output:18

When call OFSwitch.DumpFlowStats we get errors like this:

E1111 17:53:52.088468   11670 match.go:188] "Failed to decode MatchField" err="Unsupported match field: 31 in class: 64022" data="\x93l\x80\x00\n\x02\b\x00\x80\x00\f\x02\x11\x11\x80\x00\x16\x04\xa9\xfe\xa9\xfe\x00\x00...

E1111 17:53:52.088526   11670 match.go:95] "Failed to unmarshal MatchField" err="Unsupported match field: 31 in class: 64022" data="\xfa\x16>S\x93l\x80\x00\n\x02\b\x00\x80\x00\f\x02\x11\x11\x80\x00\x16\x04\xa9\xfe\xa9...

E1111 17:53:52.088561   11670 multipart.go:2176] "Failed to unmarshal FlowDesc's Match" err="Unsupported match field: 31 in class: 64022" data="\x80\x00\x06\x06\xfa\x16>S\x93l\x80\x00\n\x02\b\x00\x80\x00\f\x02\x11\x11...

E1111 17:53:52.088595   11670 multipart.go:287] "Failed to unmarshal MultipartReply's Body" err="Unsupported match field: 31 in class: 64022" data="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00*\x80\x00...

E1111 17:53:52.088631   11670 stream.go:44] "Failed to parse received message" err="Unsupported match field: 31 in class: 64022" bytes="\x06\x13\bh\x00\x00\x00\x93\x00\x01\x00\x00\x00\x00\x00\x00\x00\xa0\x00\x00\x00\x00...

After remove the dl_vlan match and pop_vlan action, the OFSwitch.DumpFlowStats works fine.
Then we also tried to change the match filed dl_vlan to vlan_vid/vlan_tci, but not work.

Has anyone experienced the same problem? How was it resolved?